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FIREFIGHTER (on radio):
This has got potential
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00:00:03,133 --> 00:00:05,133
for a major incident.
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00:00:05,166 --> 00:00:08,733
NARRATOR:
A wildfire races toward
a sleeping California town.
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00:00:08,766 --> 00:00:12,800
WILLIAM HART:
Right now, guys,
Paradise is on effin' fire.
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00:00:12,833 --> 00:00:16,066
NARRATOR:
Residents awaken to a nightmare.
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00:00:16,100 --> 00:00:18,466
TAMRA FISHER (crying):
I don't want to die here.
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00:00:18,500 --> 00:00:21,633
NARRATOR:
Scientists speed
toward the danger zone...
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00:00:21,666 --> 00:00:24,966
CRAIG CLEMENTS:
Yes, that's a scan we want.
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00:00:25,000 --> 00:00:28,566
NARRATOR:
...risking it all to unlock
the mysteries of fire.
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00:00:28,600 --> 00:00:31,466
MARK FINNEY:
It's not something
that you can just observe it
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00:00:31,500 --> 00:00:32,400
and figure out how it works.
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00:00:32,433 --> 00:00:36,233
NARRATOR:
Paradise is lost.
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00:00:36,266 --> 00:00:39,766
KEN PIMLOTT:
We have witnessed literally
an entire community gone.
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00:00:39,800 --> 00:00:44,133
NARRATOR:
It's the worst fire
in a season of worsts.
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00:00:44,166 --> 00:00:45,733
But why?
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00:00:45,766 --> 00:00:47,433
A history of mismanagement.
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00:00:47,466 --> 00:00:48,933
STEPHEN PYNE:
Everywhere, foresters
were trying
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00:00:48,966 --> 00:00:50,366
to do the same, silly thing.
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00:00:50,400 --> 00:00:51,933
NARRATOR:
A warming climate.
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00:00:51,966 --> 00:00:54,200
CATHY WHITLOCK:
I think we're moving
into uncharted territory.
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00:00:54,233 --> 00:00:58,433
NARRATOR:
And a building boom
in the forest.
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00:00:58,466 --> 00:00:59,900
We're literally putting homes
in the line of fire.
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00:00:59,933 --> 00:01:04,266
NARRATOR:
The stakes-- and the flames--
grow higher.
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00:01:04,300 --> 00:01:05,966
Right now, I'm wondering
if we're in a good spot.
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00:01:06,000 --> 00:01:07,933
♪
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NARRATOR:
"Inside the Megafire,"
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00:01:09,266 --> 00:01:11,333
right now, on "NOVA."
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00:01:11,366 --> 00:01:15,433
♪
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00:01:17,733 --> 00:01:27,766
Major funding for "NOVA"
is provided by the following:
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00:01:27,766 --> 00:01:35,400
Major funding for "NOVA"
is provided by the following:
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00:01:37,000 --> 00:01:38,566
NARRATOR:
Another sunny day
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00:01:38,600 --> 00:01:42,033
in the Sierra Nevada Mountains
north of Sacramento.
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00:01:42,066 --> 00:01:44,900
November 8, 2018.
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NEWS ANCHOR (on radio):
Skies are clear over Northern
California today,
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00:01:48,600 --> 00:01:52,633
but it is going to be a very
dangerous day for fire danger.
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NARRATOR:
It's been more than 200 days
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00:01:56,100 --> 00:02:00,400
since there was any rain
worth measuring.
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00:02:00,433 --> 00:02:02,566
The forest is bone-dry.
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00:02:02,600 --> 00:02:04,466
♪
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00:02:04,500 --> 00:02:06,766
And now the wind season
has arrived--
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00:02:06,800 --> 00:02:09,566
with a vengeance.
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00:02:09,600 --> 00:02:12,233
The strongest winds are expected
across the Sierra,
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00:02:12,266 --> 00:02:14,100
where gusts could reach
60 miles an hour.
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00:02:14,133 --> 00:02:18,100
NARRATOR:
The stage is set for disaster.
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00:02:18,133 --> 00:02:20,566
♪
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Then, 85 miles north
of Sacramento,
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00:02:23,400 --> 00:02:27,400
in a tiny hamlet called Pulga,
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00:02:27,433 --> 00:02:30,200
the wind blows a high-voltage
power line off a tower
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00:02:30,233 --> 00:02:31,933
near the Camp Creek.
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00:02:31,966 --> 00:02:35,033
Sparks fly.
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00:02:35,066 --> 00:02:40,800
In 15 minutes, the first reports
of fire come in.
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It is 6:30 in the morning.
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The Camp Fire has just begun.
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00:02:45,866 --> 00:02:48,900
When first responders arrive,
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00:02:48,933 --> 00:02:51,000
the flames are already
so fierce,
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00:02:51,033 --> 00:02:53,133
and the winds so strong,
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00:02:53,166 --> 00:02:55,833
they have trouble getting close
to the fire.
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FIREFIGHTER (on radio):
Eyes on the vegetation fire.
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00:02:58,033 --> 00:02:59,966
It's going to be very difficult
to access.
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00:03:00,000 --> 00:03:02,000
Camp Creek Road
is nearly inaccessible.
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00:03:02,033 --> 00:03:04,566
It's got about a 35-mile-an-hour
sustained wind on it.
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00:03:04,600 --> 00:03:07,566
NARRATOR:
It's moving incredibly fast,
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00:03:07,600 --> 00:03:11,000
with a speed that stuns
even veteran firefighters.
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00:03:11,033 --> 00:03:14,566
FIREFIGHTER (on radio):
This has got potential
for a major incident.
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00:03:16,333 --> 00:03:21,400
NARRATOR:
By 7:30, authorities issue
an evacuation order for Pulga,
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00:03:21,433 --> 00:03:23,866
where the fire funnels
up a canyon,
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00:03:23,900 --> 00:03:28,300
picks up speed,
and explodes out over the rim.
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00:03:29,633 --> 00:03:34,266
The fire is now burning
an acre of forest every second.
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00:03:34,300 --> 00:03:37,800
Firefighters cannot fight
the flames.
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00:03:37,833 --> 00:03:40,866
Instead, they focus
on rescuing residents.
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00:03:40,900 --> 00:03:44,166
FIREFIGHTER 2 (on radio):
In Pulga, it's already
crossing that area,
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00:03:44,200 --> 00:03:45,700
heading towards the Concow area.
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00:03:45,733 --> 00:03:49,966
NARRATOR:
The fire consumes
the small community of Concow
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00:03:50,000 --> 00:03:52,966
and heads toward
Paradise, California,
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00:03:53,000 --> 00:03:55,866
where residents have
just received immediate orders
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00:03:55,900 --> 00:03:57,133
to evacuate.
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00:03:57,166 --> 00:03:59,300
PIMLOTT:
This fire starts,
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00:03:59,333 --> 00:04:02,300
and within minutes,
it's hundreds of acres.
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00:04:02,333 --> 00:04:06,266
NARRATOR:
The man in charge of the state's
wildfire fighting force,
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00:04:06,300 --> 00:04:07,300
Cal Fire,
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00:04:07,333 --> 00:04:09,033
is Ken Pimlott.
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00:04:09,066 --> 00:04:11,266
He's never seen
anything like it.
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00:04:11,300 --> 00:04:15,700
Within an hour, it is
in the town of Paradise.
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00:04:15,733 --> 00:04:16,866
NARRATOR:
Paradise.
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00:04:16,899 --> 00:04:20,399
Nestled in the woods
high in the Sierra.
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00:04:20,433 --> 00:04:24,066
A close-knit community
of 26,000,
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00:04:24,100 --> 00:04:28,633
many of them retirees drawn
to the charm and beauty
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00:04:28,666 --> 00:04:32,400
of life
in a small mountain town.
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00:04:32,433 --> 00:04:36,300
But along with it
comes a looming vulnerability
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00:04:36,333 --> 00:04:38,933
about to be made
hellishly evident
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00:04:38,966 --> 00:04:42,300
by the firestorm
stampeding toward them.
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00:04:42,333 --> 00:04:45,566
HART:
Right now, guys,
Paradise is on effin' fire.
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00:04:45,600 --> 00:04:48,766
BRIAN ANDREWS:
I'm just going to get
the (bleep) out of Dodge.
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00:04:48,800 --> 00:04:50,566
This is getting heavy.
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00:04:50,600 --> 00:04:52,566
NARRATOR:
Residents attempt to flee...
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00:04:52,600 --> 00:04:53,900
ANDREWS:
Everything is burning.
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00:04:53,933 --> 00:04:56,633
Oh, my God, I mean everything.
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00:04:56,666 --> 00:04:59,533
NARRATOR:
...forced to run a gauntlet
through flame.
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00:04:59,566 --> 00:05:03,533
There are only four roads
that lead off the mountain,
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00:05:03,566 --> 00:05:05,500
and all of them are perilous.
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00:05:05,533 --> 00:05:08,300
FISHER (honking horn):
Come on!
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00:05:08,333 --> 00:05:10,500
Just go!
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00:05:10,533 --> 00:05:14,500
NARRATOR:
Chaos captured
in harrowing cell phone videos.
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00:05:14,533 --> 00:05:17,633
FISHER:
Oh, my God,
there's fire everywhere.
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(crying):
I don't want to die here.
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00:05:19,966 --> 00:05:22,033
I don't want to die.
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00:05:22,066 --> 00:05:24,166
NARRATOR:
A tense escape from hell.
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00:05:24,200 --> 00:05:27,466
FISHER (sobbing):
I'm scared!
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00:05:27,500 --> 00:05:28,933
PIMLOTT:
It's Armageddon.
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00:05:28,966 --> 00:05:30,200
FISHER:
It's so hot.
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00:05:30,233 --> 00:05:31,433
Keep going!
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00:05:31,466 --> 00:05:33,100
HART
Holy (bleep)!
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00:05:33,133 --> 00:05:34,200
People are leaving their cars.
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00:05:34,233 --> 00:05:35,666
WOMAN:
Oh, my God.
It's okay.
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00:05:35,700 --> 00:05:36,666
WOMAN:
What should we do?
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00:05:36,700 --> 00:05:38,266
HART:
We got to get out of here.
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00:05:38,300 --> 00:05:40,133
NARRATOR:
First responders race
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00:05:40,166 --> 00:05:43,733
to rescue hundreds of people
trapped in their homes...
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00:05:43,766 --> 00:05:44,900
WOMAN:
Are they coming for us?
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00:05:44,933 --> 00:05:45,833
POLICEMAN:
Come on.
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00:05:45,866 --> 00:05:47,200
WOMAN:
Watch out! Watch out!
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00:05:47,233 --> 00:05:48,833
Jess!
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00:05:48,866 --> 00:05:50,500
NARRATOR:
...cars...
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00:05:50,533 --> 00:05:52,133
DISPATCHER (on radio):
Be advised, on Clark Road
at Skyway,
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00:05:52,166 --> 00:05:54,733
there's a woman in labor,
she's in a beige Honda Pilot.
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00:05:54,766 --> 00:05:56,800
She's going to be honking
her horn.
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00:05:56,833 --> 00:05:59,533
POLICEMAN 2 (on radio):
We have to get this traffic
moving, now!
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00:05:59,566 --> 00:06:02,466
NARRATOR:
...even a hospital.
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00:06:02,500 --> 00:06:05,400
DISPATCHER 2 (on radio):
All patients now out
of Feather River Hospital.
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00:06:05,433 --> 00:06:07,700
All patients out and en route.
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00:06:07,733 --> 00:06:08,666
♪
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00:06:08,700 --> 00:06:10,700
ANDREWS:
Go get 'em, boys.
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00:06:10,733 --> 00:06:12,033
Be safe.
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00:06:12,066 --> 00:06:14,700
NARRATOR:
It's now 9:30.
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00:06:14,733 --> 00:06:15,800
Just to the north,
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00:06:15,833 --> 00:06:18,433
in the neighboring community
of Magalia,
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00:06:18,466 --> 00:06:21,533
George Gold would normally be up
by now,
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00:06:21,566 --> 00:06:23,533
but today he sleeps in.
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00:06:23,566 --> 00:06:24,933
What woke me up was the wind.
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00:06:24,966 --> 00:06:27,133
We often have wind here;
I think, "Oh, how nice."
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00:06:27,166 --> 00:06:28,600
I open the door, and it's windy.
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00:06:28,633 --> 00:06:30,800
♪
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00:06:30,833 --> 00:06:32,866
I look up, and it's dark.
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00:06:32,900 --> 00:06:34,800
I thought,
"Oh, it's going to rain."
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00:06:34,833 --> 00:06:36,633
I smell the smoke.
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00:06:36,666 --> 00:06:38,900
I said,
"It's not going to rain."
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00:06:38,933 --> 00:06:41,466
I get dressed, I go outside,
I look around.
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00:06:41,500 --> 00:06:43,566
At that point,
the street wasn't burning.
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00:06:43,600 --> 00:06:45,600
But I could see fire,
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00:06:45,633 --> 00:06:47,966
and I thought,
"Oh, this is the real thing."
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00:06:48,000 --> 00:06:51,000
NARRATOR:
He's lived here for 11 years,
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00:06:51,033 --> 00:06:54,100
drawn by the quiet
and the beauty.
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00:06:54,133 --> 00:06:57,466
It is his dream home
for retirement.
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00:06:57,500 --> 00:07:02,566
Now he must leave it all behind
in a hurry.
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00:07:02,600 --> 00:07:04,666
♪
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00:07:04,700 --> 00:07:06,233
MAN (on radio):
Please, get out of town.
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00:07:06,266 --> 00:07:08,800
And as you're going out of town,
please be careful...
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00:07:08,833 --> 00:07:12,433
NARRATOR:
But the roads are clogged
with traffic and obstacles,
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00:07:12,466 --> 00:07:16,233
downed power lines, and trees.
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00:07:16,266 --> 00:07:18,133
(saw whirring)
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00:07:18,166 --> 00:07:20,566
Crews are racing
to clear the way.
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00:07:20,600 --> 00:07:24,266
So George decides to wait.
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00:07:24,300 --> 00:07:28,133
He drives his prized convertible
to a nearby parking lot,
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00:07:28,166 --> 00:07:31,266
hoping it will be safe there.
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00:07:31,300 --> 00:07:33,933
He records these images
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00:07:33,966 --> 00:07:37,566
as the fire closes in
on his community.
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00:07:37,600 --> 00:07:40,066
GOLD:
You know, you stand here,
and you just look around,
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00:07:40,100 --> 00:07:42,666
and the next thing, I see that
the high school is on fire,
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00:07:42,700 --> 00:07:44,233
and it is just going up.
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00:07:44,266 --> 00:07:49,366
♪
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00:07:52,466 --> 00:07:54,300
NARRATOR:
Just after noon,
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00:07:54,333 --> 00:07:56,400
the fire is still raging.
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00:07:56,433 --> 00:07:59,266
Many of George's neighbors
are gathering
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00:07:59,300 --> 00:08:02,000
in another parking lot,
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00:08:02,033 --> 00:08:04,133
wondering if they are safe.
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00:08:04,166 --> 00:08:05,433
I couldn't get in at 9:00.
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00:08:05,466 --> 00:08:08,400
NARRATOR:
John Roberson has lived here
eight years.
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00:08:08,433 --> 00:08:09,566
Now, this is kind of spooky.
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00:08:09,600 --> 00:08:11,866
So that's what I'm looking at.
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00:08:11,900 --> 00:08:12,866
As you can see,
that's black smoke.
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00:08:12,900 --> 00:08:14,400
Our home right now
is safe.
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00:08:14,433 --> 00:08:17,400
If it jumps up here to
South Park Circle and Andover,
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00:08:17,433 --> 00:08:19,333
it's gone.
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00:08:19,366 --> 00:08:21,566
NARRATOR:
Nearby,
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00:08:21,600 --> 00:08:25,200
Mike and Alice Nutt are packing
whatever they can fit
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00:08:25,233 --> 00:08:26,300
in their cars.
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00:08:26,333 --> 00:08:27,366
ALICE NUTT:
I got soda,
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00:08:27,400 --> 00:08:31,666
blankets, pillows, food,
my animals.
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00:08:31,700 --> 00:08:34,500
(laughing):
Oh, my dogs.
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00:08:34,533 --> 00:08:35,866
They're my babies.
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00:08:35,900 --> 00:08:39,166
And then, I'm, I'm just scared,
I am very scared.
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00:08:39,200 --> 00:08:42,566
We got our cars loaded up,
don't know where to go.
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00:08:46,433 --> 00:08:49,766
♪
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00:08:49,800 --> 00:08:52,433
NARRATOR:
6:00 p.m.,
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00:08:52,466 --> 00:08:56,200
less than 12 hours
since it began,
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00:08:56,233 --> 00:08:57,800
and yet so much damage,
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00:08:57,833 --> 00:09:01,066
so many lives changed forever.
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00:09:01,100 --> 00:09:03,766
ANDREWS:
Oh, my God,
half of our town is gone.
199
00:09:03,800 --> 00:09:07,033
NARRATOR:
55,000 acres burned;
200
00:09:07,066 --> 00:09:12,033
at least 1,000 structures
destroyed.
201
00:09:12,066 --> 00:09:14,800
The Nutts' house?
202
00:09:14,833 --> 00:09:16,633
Gone.
203
00:09:16,666 --> 00:09:19,233
And so is the Robersons'.
204
00:09:19,266 --> 00:09:21,700
♪
205
00:09:21,733 --> 00:09:24,633
George Gold is mesmerized
206
00:09:24,666 --> 00:09:27,300
by what is unfolding
before his eyes,
207
00:09:27,333 --> 00:09:29,466
but now he knows
it's time to get out.
208
00:09:29,500 --> 00:09:31,733
(sirens blaring)
209
00:09:31,766 --> 00:09:34,166
He decides to check
on his house.
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00:09:34,200 --> 00:09:37,200
GOLD:
When I came down here,
everything was still burning.
211
00:09:37,233 --> 00:09:38,600
So I came here, turned around,
212
00:09:38,633 --> 00:09:40,166
I shot a couple of pictures,
and I took off.
213
00:09:40,200 --> 00:09:44,433
But the house was already
completely engulfed in fire.
214
00:09:44,466 --> 00:09:46,366
♪
215
00:09:46,400 --> 00:09:50,366
NARRATOR:
There is no hope
for Magalia or Paradise.
216
00:09:50,400 --> 00:09:54,933
And the Camp Fire keeps growing.
217
00:09:54,966 --> 00:09:58,200
While George is driving
toward safety,
218
00:09:58,233 --> 00:10:02,166
meteorologist Craig Clements
is headed
219
00:10:02,200 --> 00:10:04,466
in the opposite direction.
220
00:10:04,500 --> 00:10:08,133
He and his team
are on an urgent mission
221
00:10:08,166 --> 00:10:11,433
to shed some light
on how wildfires spread.
222
00:10:11,466 --> 00:10:13,866
Oh, look at that-- beautiful.
223
00:10:13,900 --> 00:10:15,533
Yes, that's a scan we want.
224
00:10:15,566 --> 00:10:17,600
NARRATOR:
It's dangerous work.
225
00:10:17,633 --> 00:10:19,066
But the risk comes
with the possibility
226
00:10:19,100 --> 00:10:21,966
of a big scientific payoff.
227
00:10:22,000 --> 00:10:23,066
That's interesting,
228
00:10:23,100 --> 00:10:25,666
we're coming
into some smoke here.
229
00:10:25,700 --> 00:10:27,533
Perfect, perfect, perfect.
230
00:10:27,566 --> 00:10:31,900
NARRATOR:
They are driving
a one-of-a-kind custom rig.
231
00:10:31,933 --> 00:10:34,800
They hope to peer into the fire
232
00:10:34,833 --> 00:10:37,100
in a way
that no one else has before.
233
00:10:37,133 --> 00:10:39,466
CLEMENTS:
We need to better understand
fire spread,
234
00:10:39,500 --> 00:10:43,200
and the meteorological data
is one of the key components.
235
00:10:43,233 --> 00:10:46,766
And yet we never measure things
on an active wildfire.
236
00:10:46,800 --> 00:10:48,633
We usually use a satellite.
237
00:10:48,666 --> 00:10:52,266
We see plumes in the radar,
which is great, but, you know,
238
00:10:52,300 --> 00:10:55,533
we're not really seeing
what's going on right here.
239
00:10:55,566 --> 00:10:57,333
NARRATOR:
Plumes--
240
00:10:57,366 --> 00:11:01,100
the columns of smoke and gas
that rise from the flames--
241
00:11:01,133 --> 00:11:03,633
are more than a sign of fire.
242
00:11:03,666 --> 00:11:06,866
They also create
their own weather.
243
00:11:06,900 --> 00:11:10,700
And Craig suspects that
they actively spread the fire.
244
00:11:10,733 --> 00:11:12,333
But how?
245
00:11:12,366 --> 00:11:16,200
To understand,
he aims a sophisticated lidar
246
00:11:16,233 --> 00:11:17,366
right at the plume.
247
00:11:17,400 --> 00:11:19,066
♪
248
00:11:19,100 --> 00:11:22,733
Lidar is like radar
that uses a laser beam.
249
00:11:22,766 --> 00:11:25,000
It bounces off
the smoke particulates
250
00:11:25,033 --> 00:11:26,966
as they are propelled
by the wind
251
00:11:27,000 --> 00:11:28,966
in and around the plume
252
00:11:29,000 --> 00:11:33,833
and returns information
about speed and direction.
253
00:11:33,866 --> 00:11:37,133
CLEMENTS:
We've been able to slice
through a plume with our lidar.
254
00:11:37,166 --> 00:11:39,433
And we've been able
to measure rotation
255
00:11:39,466 --> 00:11:41,900
and the wind field associated
with a rotating column,
256
00:11:41,933 --> 00:11:43,433
and so that's pretty exciting.
257
00:11:43,466 --> 00:11:48,300
NARRATOR:
The plumes at fires like these
are complicated systems.
258
00:11:48,333 --> 00:11:52,566
As hot air rises,
cooler air rushes in.
259
00:11:52,600 --> 00:11:55,266
It's called fire-induced wind.
260
00:11:55,300 --> 00:11:56,566
CLEMENTS:
We don't know
261
00:11:56,600 --> 00:11:59,333
how that fire-induced wind
from the plume interacts
262
00:11:59,366 --> 00:12:00,766
with pushing the fire front.
263
00:12:00,800 --> 00:12:03,000
If the plume goes up,
264
00:12:03,033 --> 00:12:05,533
does any air or smoke
come back down?
265
00:12:05,566 --> 00:12:06,833
And if it does come back down,
266
00:12:06,866 --> 00:12:09,466
can that spread the fire
in different directions?
267
00:12:09,500 --> 00:12:10,566
It's these interactions
268
00:12:10,600 --> 00:12:12,933
that we call
fire-atmosphere interactions,
269
00:12:12,966 --> 00:12:14,866
and we don't have a great handle
270
00:12:14,900 --> 00:12:17,366
on how they propagate
fire spread.
271
00:12:17,400 --> 00:12:21,433
♪
272
00:12:21,466 --> 00:12:25,633
NARRATOR:
The Camp Fire continues
to spread without slowing down.
273
00:12:25,666 --> 00:12:28,666
REPORTER:
Cal Fire says
the town of Paradise
274
00:12:28,700 --> 00:12:29,800
is pretty much destroyed.
275
00:12:29,833 --> 00:12:32,500
NARRATOR:
48 hours after it began,
276
00:12:32,533 --> 00:12:36,366
it has burned
more than 100,000 acres--
277
00:12:36,400 --> 00:12:39,666
a grim milestone.
278
00:12:39,700 --> 00:12:42,200
It is now officially
a "megafire."
279
00:12:42,233 --> 00:12:45,333
Eventually, 86 lives are lost,
280
00:12:45,366 --> 00:12:49,900
nearly 19,000 structures
destroyed
281
00:12:49,933 --> 00:12:53,733
in the most destructive fire
in California history.
282
00:12:53,766 --> 00:12:58,366
It stands apart,
but it is not an isolated event.
283
00:12:58,400 --> 00:12:59,966
♪
284
00:13:00,000 --> 00:13:01,166
One year earlier,
285
00:13:01,200 --> 00:13:04,666
the second-most
destructive fire, Tubbs,
286
00:13:04,700 --> 00:13:06,766
burned
more than 5,600 structures
287
00:13:06,800 --> 00:13:10,000
and killed 22.
288
00:13:10,033 --> 00:13:14,700
Little more than three months
before Paradise is destroyed,
289
00:13:14,733 --> 00:13:18,933
the Carr megafire devoured
a quarter-million acres
290
00:13:18,966 --> 00:13:20,266
and a thousand homes
291
00:13:20,300 --> 00:13:22,800
in and around Redding.
292
00:13:22,833 --> 00:13:24,700
Eight people perished.
293
00:13:24,733 --> 00:13:28,200
And on the same day
the Camp Fire began,
294
00:13:28,233 --> 00:13:29,733
the Woolsey Fire started
295
00:13:29,766 --> 00:13:32,700
in Los Angeles
and Ventura Counties.
296
00:13:32,733 --> 00:13:38,133
It burned 97,000 acres,
killing three.
297
00:13:38,166 --> 00:13:43,366
Of the ten most destructive
fires in California history,
298
00:13:43,400 --> 00:13:48,500
six occurred in the 13 months
prior to the Camp Fire.
299
00:13:48,533 --> 00:13:52,500
PIMLOTT:
We are doing everything we can
to respond and protect citizens,
300
00:13:52,533 --> 00:13:56,066
but fire is part
of the landscape in California.
301
00:13:56,100 --> 00:13:57,166
This is the normal now.
302
00:13:57,200 --> 00:13:59,233
♪
303
00:13:59,266 --> 00:14:01,433
NARRATOR:
And it's not just California.
304
00:14:01,466 --> 00:14:03,100
Across the U.S.,
305
00:14:03,133 --> 00:14:07,700
an area larger than the state
of Maryland burned in 2018.
306
00:14:07,733 --> 00:14:12,033
PARK WILLIAMS:
In the last 40 years or so,
the amount of forest that burns
307
00:14:12,066 --> 00:14:13,733
in any given year
in the Western United States
308
00:14:13,766 --> 00:14:16,066
has increased by about 1,000%.
309
00:14:16,100 --> 00:14:18,000
♪
310
00:14:18,033 --> 00:14:19,333
That means
311
00:14:19,366 --> 00:14:23,166
there's about ten times
more forest burning this year
312
00:14:23,200 --> 00:14:25,433
than there was in a year
in the 1970s or 1980s.
313
00:14:25,466 --> 00:14:26,866
♪
314
00:14:26,900 --> 00:14:28,066
NARRATOR:
All over the world,
315
00:14:28,100 --> 00:14:31,633
wildfires are bigger,
more frequent,
316
00:14:31,666 --> 00:14:33,066
and more destructive.
317
00:14:33,100 --> 00:14:38,766
In July 2018, fires killed
nearly 100 in Greece.
318
00:14:38,800 --> 00:14:43,866
In Sweden, fires burned
above the Arctic Circle
319
00:14:43,900 --> 00:14:46,633
in the midst
of an unusual heat wave.
320
00:14:46,666 --> 00:14:52,066
And huge fires burned in Canada,
Russia, and Australia.
321
00:14:52,100 --> 00:14:56,666
Why are we living
in an age of megafires?
322
00:14:56,700 --> 00:14:57,866
♪
323
00:14:57,900 --> 00:14:59,433
DONALD FALK:
The big question is,
324
00:14:59,466 --> 00:15:02,533
"Are these giant, destructive
megafires we're seeing today
325
00:15:02,566 --> 00:15:04,200
"just the way forests burn,
326
00:15:04,233 --> 00:15:05,700
"or is this somehow a new normal
327
00:15:05,733 --> 00:15:07,866
"that we've created
by our own actions,
328
00:15:07,900 --> 00:15:09,966
forest management,
and climate change?"
329
00:15:10,000 --> 00:15:12,266
♪
330
00:15:15,533 --> 00:15:18,466
♪
331
00:15:18,500 --> 00:15:19,900
NARRATOR:
Near Paradise,
332
00:15:19,933 --> 00:15:23,233
firefighters have more pressing
questions on their minds.
333
00:15:23,266 --> 00:15:28,466
Like how best to stop a fire
driven by fierce wind
334
00:15:28,500 --> 00:15:30,600
and steep terrain--
335
00:15:30,633 --> 00:15:35,833
a major factor
in its relentless spread.
336
00:15:35,866 --> 00:15:39,300
Researchers are studying this
337
00:15:39,333 --> 00:15:41,200
at the
U.S. Department of Agriculture's
338
00:15:41,233 --> 00:15:45,966
Missoula Fire Sciences
Laboratory.
339
00:15:46,000 --> 00:15:47,733
If you are going to do
fire research,
340
00:15:47,766 --> 00:15:48,766
this is the place to do it.
341
00:15:48,800 --> 00:15:51,966
This entire building is devoted
to fire.
342
00:15:52,000 --> 00:15:55,100
It's actually
a pretty complex phenomenon.
343
00:15:55,133 --> 00:15:57,133
It's not something
that you can just observe it
344
00:15:57,166 --> 00:15:58,866
and figure out how it works.
345
00:15:58,900 --> 00:16:02,100
NARRATOR:
Forest Service scientist
Mark Finney
346
00:16:02,133 --> 00:16:06,100
showed us how they unlock
the mysteries of fire.
347
00:16:06,133 --> 00:16:08,100
So this is the burn chamber
right here.
348
00:16:08,133 --> 00:16:09,833
Everything we do in here
349
00:16:09,866 --> 00:16:12,100
is designed to look
at how fires behave.
350
00:16:12,133 --> 00:16:13,733
NARRATOR:
On this day,
351
00:16:13,766 --> 00:16:16,766
he and a dozen of his colleagues
are preparing for a test
352
00:16:16,800 --> 00:16:22,200
on a large, tilting burn bed
of precisely cut cardboard.
353
00:16:22,233 --> 00:16:24,566
FINNEY:
What we can do is put these
on the burn bed
354
00:16:24,600 --> 00:16:26,366
in any kind of density
that we'd like
355
00:16:26,400 --> 00:16:28,400
to engineer whatever kind
of fire we'd like--
356
00:16:28,433 --> 00:16:29,800
how long we want it to burn,
357
00:16:29,833 --> 00:16:31,666
how long the flames are,
how fast it spreads.
358
00:16:31,700 --> 00:16:34,933
NARRATOR:
The burn table brims
with instruments
359
00:16:34,966 --> 00:16:37,600
that measure pressure
and temperature,
360
00:16:37,633 --> 00:16:40,166
taking samples 500 times
a second.
361
00:16:40,200 --> 00:16:42,266
And there are cameras
everywhere.
362
00:16:42,300 --> 00:16:46,666
Today, they are trying
to understand more
363
00:16:46,700 --> 00:16:51,066
about how a fire spreads uphill,
as it did near Paradise.
364
00:16:51,100 --> 00:16:52,100
FINNEY:
Okay, go ahead.
365
00:16:52,133 --> 00:16:53,700
Line of fire, guys, good line.
366
00:16:54,633 --> 00:16:56,666
Okay.
367
00:16:58,233 --> 00:17:00,200
NARRATOR:
The flames are the visible sign
368
00:17:00,233 --> 00:17:03,900
of rapid oxidation, or fire.
369
00:17:03,933 --> 00:17:08,400
Fire requires dry, flammable
material, or fuel,
370
00:17:08,433 --> 00:17:09,766
oxygen,
371
00:17:09,800 --> 00:17:13,866
and a heat source to create
this chemical chain reaction.
372
00:17:13,900 --> 00:17:17,766
Wildfires add
two additional elements--
373
00:17:17,800 --> 00:17:19,966
weather and topography--
374
00:17:20,000 --> 00:17:21,433
that determine
how the flames
375
00:17:21,466 --> 00:17:24,633
will grow and spread.
376
00:17:24,666 --> 00:17:27,033
FINNEY:
The reason we're measuring this
377
00:17:27,066 --> 00:17:29,466
is that you can actually
get fires
378
00:17:29,500 --> 00:17:32,500
to accelerate extremely quickly
going uphill.
379
00:17:32,533 --> 00:17:35,066
NARRATOR:
Unlike the humans
that fight them,
380
00:17:35,100 --> 00:17:38,166
wildfires move much faster
uphill.
381
00:17:38,200 --> 00:17:39,566
FINNEY:
When you have a slope,
382
00:17:39,600 --> 00:17:41,766
you can't get air in
from the uphill side
383
00:17:41,800 --> 00:17:44,833
as easily as you can get it in
from the downhill side.
384
00:17:44,866 --> 00:17:47,033
If the slope
is sufficiently steep,
385
00:17:47,066 --> 00:17:49,733
all of the air is coming in
from the downhill side.
386
00:17:49,766 --> 00:17:52,466
NARRATOR:
With air fanning the fire
387
00:17:52,500 --> 00:17:54,300
exclusively
on the downhill side,
388
00:17:54,333 --> 00:17:57,066
the flames get pushed
into the slope,
389
00:17:57,100 --> 00:18:00,166
putting them in contact
with more fuel.
390
00:18:00,200 --> 00:18:04,200
The tilted, climbing fire
transfers a lot of heat
391
00:18:04,233 --> 00:18:07,000
to the trees and brush
ahead of the flames,
392
00:18:07,033 --> 00:18:11,833
preheating and drying them,
making them more combustible.
393
00:18:11,866 --> 00:18:14,066
FINNEY:
You get very, very effective
heat transfer
394
00:18:14,100 --> 00:18:16,200
and a much faster-spreading
fire.
395
00:18:16,233 --> 00:18:19,866
NARRATOR:
This is what happened
when the Camp Fire started.
396
00:18:19,900 --> 00:18:23,666
The wind funneled the flames
into a steep canyon,
397
00:18:23,700 --> 00:18:27,466
and they rapidly accelerated
uphill,
398
00:18:27,500 --> 00:18:30,233
right toward Paradise.
399
00:18:30,266 --> 00:18:34,700
On the morning
after Paradise is lost,
400
00:18:34,733 --> 00:18:37,900
the Camp Fire
is still spreading.
401
00:18:37,933 --> 00:18:40,600
♪
402
00:18:40,633 --> 00:18:45,133
Time for firefighters to report
for the daily briefing.
403
00:18:45,166 --> 00:18:46,233
Engine 83.
MAN:
Here.
404
00:18:46,266 --> 00:18:48,366
36-31-Charlie.
MAN:
Here.
405
00:18:48,400 --> 00:18:49,600
Engine 25.
MAN:
Here.
406
00:18:49,633 --> 00:18:50,933
All right, good morning,
everybody.
407
00:18:50,966 --> 00:18:53,766
I got 7:00, we're going
to go ahead and get started
408
00:18:53,800 --> 00:18:55,500
with the
operational briefing.
409
00:18:55,533 --> 00:18:58,000
NARRATOR:
Thousands of firefighters
are here,
410
00:18:58,033 --> 00:18:59,400
and more are on the way.
411
00:18:59,433 --> 00:19:01,466
Okay,
up here in Cresta area,
412
00:19:01,500 --> 00:19:04,266
the fire has progressed
to the east.
413
00:19:04,300 --> 00:19:06,300
It's on both sides
of the river,
414
00:19:06,333 --> 00:19:08,900
continuing to eat its way
downcanyon.
415
00:19:08,933 --> 00:19:09,966
Good morning, everyone.
416
00:19:10,000 --> 00:19:11,733
NARRATOR:
Incident meteorologist Alex Hoon
417
00:19:11,766 --> 00:19:14,566
is worried
about what lies ahead.
418
00:19:14,600 --> 00:19:16,933
There's going to be
a lot of shifting winds,
419
00:19:16,966 --> 00:19:18,266
very dry conditions.
420
00:19:18,300 --> 00:19:20,733
Use your lookouts,
use your communication,
421
00:19:20,766 --> 00:19:22,966
make it a safe day.
422
00:19:25,133 --> 00:19:27,200
NARRATOR:
He taps into a suite
of instruments
423
00:19:27,233 --> 00:19:31,166
on the ground, in aircraft,
and in space.
424
00:19:31,200 --> 00:19:34,133
Orbiting 22,000 miles
above the Earth,
425
00:19:34,166 --> 00:19:37,466
the two-year-old
GOES-16 weather satellite
426
00:19:37,500 --> 00:19:40,966
captured visible and
infrared images of the Camp Fire
427
00:19:41,000 --> 00:19:42,466
from the beginning,
428
00:19:42,500 --> 00:19:45,533
the big picture of a big fire,
429
00:19:45,566 --> 00:19:47,833
an eerily remote vantage point
430
00:19:47,866 --> 00:19:51,533
to utter chaos, death,
and destruction.
431
00:19:51,566 --> 00:19:53,500
HOON:
This particular image,
432
00:19:53,533 --> 00:19:55,133
it covers a time period
433
00:19:55,166 --> 00:19:57,066
from about 6:00 a.m.
in the morning
434
00:19:57,100 --> 00:19:59,233
all the way
until about 5:00 p.m.
435
00:19:59,266 --> 00:20:00,633
when the sun begins to go down.
436
00:20:00,666 --> 00:20:02,200
Within that 11 hours,
we estimate,
437
00:20:02,233 --> 00:20:06,300
it went from zero
to about 50,000 acres.
438
00:20:06,333 --> 00:20:10,333
And then the following 12 hours,
it grew another 40,000 acres.
439
00:20:10,366 --> 00:20:13,300
It released just
an exponential amount of energy.
440
00:20:13,333 --> 00:20:14,800
And that's
what we're seeing here
441
00:20:14,833 --> 00:20:16,766
on the satellite image.
442
00:20:16,800 --> 00:20:18,733
♪
443
00:20:18,766 --> 00:20:23,233
NARRATOR:
A big factor in the exponential
spread of the Camp Megafire:
444
00:20:23,266 --> 00:20:25,600
spotting.
445
00:20:25,633 --> 00:20:28,566
Hot embers,
also called firebrands,
446
00:20:28,600 --> 00:20:31,800
launched and carried
by 50-mile-an-hour winds,
447
00:20:31,833 --> 00:20:35,866
landed as much as a mile ahead
of the fire front.
448
00:20:35,900 --> 00:20:38,900
New spot fires started again
and again,
449
00:20:38,933 --> 00:20:41,933
rapidly, randomly.
450
00:20:41,966 --> 00:20:46,266
But exactly how spotting fuels
the growth of megafires
451
00:20:46,300 --> 00:20:50,466
is one of the big unknowns
in wildfire science.
452
00:20:50,500 --> 00:20:53,400
So it's still blowing
northeasterly.
453
00:20:53,433 --> 00:20:56,166
NARRATOR:
Craig Clements hopes his work
might lead to some answers.
454
00:20:56,200 --> 00:20:58,433
CLEMENTS:
This is a real strong
low-level jet
455
00:20:58,466 --> 00:21:00,133
coming down
off the mountains.
456
00:21:00,166 --> 00:21:01,533
NARRATOR:
Right now,
457
00:21:01,566 --> 00:21:04,700
wildfire prediction models
are not sophisticated enough
458
00:21:04,733 --> 00:21:07,033
to factor in
all of the complexities
459
00:21:07,066 --> 00:21:09,300
of the atmosphere and terrain.
460
00:21:09,333 --> 00:21:13,033
And they don't account
for spotting at all.
461
00:21:13,066 --> 00:21:14,933
CLEMENTS:
We are trying to forecast
462
00:21:14,966 --> 00:21:16,966
how many spot fires
there will be,
463
00:21:17,000 --> 00:21:20,366
and that's something
no model right now can handle.
464
00:21:20,400 --> 00:21:23,033
NARRATOR:
Better models would help
right now
465
00:21:23,066 --> 00:21:27,500
to keep firefighters safe
as they battle the Camp Fire.
466
00:21:27,533 --> 00:21:29,133
♪
467
00:21:29,166 --> 00:21:31,166
But for people in Paradise,
468
00:21:31,200 --> 00:21:33,966
there was no time
for predictions.
469
00:21:34,000 --> 00:21:36,700
PIMLOTT:
Having gone through Paradise,
470
00:21:36,733 --> 00:21:39,933
I... I...
words don't describe it.
471
00:21:39,966 --> 00:21:42,733
♪
472
00:21:42,766 --> 00:21:44,233
I mean, it, um...
473
00:21:44,266 --> 00:21:48,000
A lot like the road to Baghdad
during the first Gulf War,
474
00:21:48,033 --> 00:21:49,266
when vehicles were abandoned--
475
00:21:49,300 --> 00:21:52,266
that's literally
what it looked like.
476
00:21:52,300 --> 00:21:54,866
And we know some people perished
on those roads,
477
00:21:54,900 --> 00:21:57,000
and what those people went
through,
478
00:21:57,033 --> 00:21:58,166
and they really had no warning.
479
00:21:58,200 --> 00:22:01,066
♪
480
00:22:01,100 --> 00:22:02,333
I think this is the first time
481
00:22:02,366 --> 00:22:05,333
we've ever seen an entire town
in California
482
00:22:05,366 --> 00:22:08,266
wiped off the map
by a wildland fire.
483
00:22:08,300 --> 00:22:09,900
♪
484
00:22:09,933 --> 00:22:15,733
We have witnessed literally
an entire community gone.
485
00:22:15,766 --> 00:22:20,400
♪
486
00:22:20,433 --> 00:22:22,900
NARRATOR:
The megafire that wiped Paradise
off the map
487
00:22:22,933 --> 00:22:27,100
is more than just
a big wildfire.
488
00:22:27,133 --> 00:22:31,933
At this scale,
the physics of fire changes,
489
00:22:31,966 --> 00:22:34,600
greatly increasing
the intensity.
490
00:22:34,633 --> 00:22:35,766
But why?
491
00:22:35,800 --> 00:22:39,033
At the Missoula
Fire Sciences Laboratory,
492
00:22:39,066 --> 00:22:41,466
mechanical engineer
Sara McAllister
493
00:22:41,500 --> 00:22:43,466
is seeking an answer.
494
00:22:43,500 --> 00:22:45,666
When you have
a really wide plume,
495
00:22:45,700 --> 00:22:48,033
you're not pulling in air
into the plume
496
00:22:48,066 --> 00:22:51,400
as effectively as you are
if it's a much smaller diameter.
497
00:22:53,233 --> 00:22:54,533
NARRATOR:
In any fire,
498
00:22:54,566 --> 00:22:59,400
colder air flows in
to replace hot air as it rises.
499
00:22:59,433 --> 00:23:00,666
Most of the time,
500
00:23:00,700 --> 00:23:03,133
the air can come in
from almost any direction,
501
00:23:03,166 --> 00:23:04,633
chaotically.
502
00:23:04,666 --> 00:23:08,400
It's what makes flames flicker
and dance.
503
00:23:08,433 --> 00:23:10,866
But the flames at the center
of a megafire
504
00:23:10,900 --> 00:23:16,033
are not fed by colder air
from the sides or from above--
505
00:23:16,066 --> 00:23:20,033
the surrounding fire and plume
stand in the way.
506
00:23:20,066 --> 00:23:24,500
So the only source of air for
these flames is at ground level.
507
00:23:24,533 --> 00:23:27,900
When that happens,
the plume changes.
508
00:23:27,933 --> 00:23:29,633
♪
509
00:23:29,666 --> 00:23:32,300
Sara McAllister conducts
an experiment
510
00:23:32,333 --> 00:23:34,866
to simulate that restriction
of air from the side
511
00:23:34,900 --> 00:23:37,566
using something you might find
in your own home:
512
00:23:37,600 --> 00:23:39,066
a chimney.
513
00:23:39,100 --> 00:23:41,233
MCALLISTER:
We were wondering,
514
00:23:41,266 --> 00:23:42,500
"Does that restriction in air
515
00:23:42,533 --> 00:23:44,600
influence the burning
of the fuel underneath it?"
516
00:23:44,633 --> 00:23:48,200
The idea is that
we are scaling big-fire behavior
517
00:23:48,233 --> 00:23:49,833
into a small-fire, lab-based
experiment
518
00:23:49,866 --> 00:23:52,133
and trying to understand
what's different.
519
00:23:52,166 --> 00:23:55,733
NARRATOR:
She douses a uniform bed
of fuel,
520
00:23:55,766 --> 00:23:57,633
in this case wood blocks...
521
00:23:57,666 --> 00:23:58,666
Smells good, doesn't it?
522
00:23:58,700 --> 00:24:01,400
NARRATOR:
...with isopropyl alcohol.
523
00:24:01,433 --> 00:24:02,900
Burns very nicely.
524
00:24:02,933 --> 00:24:07,500
In the open, the flames are
about five feet high,
525
00:24:07,533 --> 00:24:10,666
as the air streams in
from all directions.
526
00:24:10,700 --> 00:24:12,300
Now watch what happens
527
00:24:12,333 --> 00:24:15,000
when she slides the burning wood
underneath the chimney,
528
00:24:15,033 --> 00:24:18,800
blocking sideways air flow.
529
00:24:18,833 --> 00:24:21,100
So we're looking at
15-, maybe 16-foot flame heights
530
00:24:21,133 --> 00:24:22,666
off of a fuel bed.
531
00:24:22,700 --> 00:24:23,800
Quite the increase.
532
00:24:23,833 --> 00:24:25,833
There's a feedback.
533
00:24:25,866 --> 00:24:27,000
When the fires get big,
534
00:24:27,033 --> 00:24:29,366
all of that air
that can't come into that plume
535
00:24:29,400 --> 00:24:30,700
has to come in on the ground,
536
00:24:30,733 --> 00:24:33,166
which is basically
just stoking your fire.
537
00:24:33,200 --> 00:24:34,866
♪
538
00:24:34,900 --> 00:24:37,600
NARRATOR:
The chimney effect created
by giant plumes
539
00:24:37,633 --> 00:24:41,866
makes megafires grow bigger,
which further fans the flames.
540
00:24:41,900 --> 00:24:46,466
It's a frightening feedback loop
that gets even scarier
541
00:24:46,500 --> 00:24:50,166
when a plume becomes
a fire whirl.
542
00:24:50,200 --> 00:24:52,700
♪
543
00:24:52,733 --> 00:24:56,000
CLEMENTS:
Fire whirls that form
on your average fire,
544
00:24:56,033 --> 00:24:57,933
you see them for a few seconds,
and they're gone.
545
00:24:57,966 --> 00:25:01,900
NARRATOR:
And normally, they don't prompt
too much concern.
546
00:25:01,933 --> 00:25:06,033
But the biggest ones,
literally fire tornadoes,
547
00:25:06,066 --> 00:25:07,433
cannot be ignored.
548
00:25:07,466 --> 00:25:10,000
♪
549
00:25:10,033 --> 00:25:13,200
Scientists used to think
they were rare, even unlikely.
550
00:25:13,233 --> 00:25:16,166
But as megafires become
more common,
551
00:25:16,200 --> 00:25:19,133
that is no longer the case.
552
00:25:19,166 --> 00:25:22,266
Three months
before the Camp Fire,
553
00:25:22,300 --> 00:25:25,466
this is what happens
in Redding, California.
554
00:25:25,500 --> 00:25:29,366
The Carr Megafire spawns
a deadly fire tornado
555
00:25:29,400 --> 00:25:34,600
that generates winds
approaching 165 miles an hour.
556
00:25:34,633 --> 00:25:37,800
But what causes the flames
to start spinning?
557
00:25:37,833 --> 00:25:39,000
MAN:
Wow.
558
00:25:39,033 --> 00:25:42,033
FINNEY:
This here is
a fire whirl generator.
559
00:25:42,066 --> 00:25:45,166
It's an apparatus that allows us
to study how fire whirls form
560
00:25:45,200 --> 00:25:47,100
and the structure of the vortex
561
00:25:47,133 --> 00:25:48,666
that's produced
inside the whirl.
562
00:25:50,166 --> 00:25:54,133
NARRATOR:
Mark Finney says they begin
with turbulent, strong winds
563
00:25:54,166 --> 00:25:58,433
that send a lopsided current
of air into the flames.
564
00:25:58,466 --> 00:26:01,400
He demonstrates
what happens next.
565
00:26:01,433 --> 00:26:03,400
FINNEY:
You'll notice at the beginning
566
00:26:03,433 --> 00:26:05,366
that the flames
are very disorganized.
567
00:26:05,400 --> 00:26:08,600
But as the inflow
begins to come in
568
00:26:08,633 --> 00:26:10,366
in a swirling fashion,
569
00:26:10,400 --> 00:26:14,900
the flames themselves
become quite organized.
570
00:26:14,933 --> 00:26:19,866
NARRATOR:
The air streams in faster
and faster from the bottom,
571
00:26:19,900 --> 00:26:22,933
fanning the flames,
strengthening the whirl.
572
00:26:22,966 --> 00:26:25,366
The burning rate of the fuel
increases
573
00:26:25,400 --> 00:26:28,333
by three to eight times
as the whirl begins to develop.
574
00:26:28,366 --> 00:26:30,000
♪
575
00:26:30,033 --> 00:26:31,500
NARRATOR:
The fire tornado in Redding
576
00:26:31,533 --> 00:26:36,233
develops after the wind starts
blowing inland from the Pacific.
577
00:26:36,266 --> 00:26:38,266
When it collides with the fire,
578
00:26:38,300 --> 00:26:41,600
it creates powerful,
swirling winds.
579
00:26:41,633 --> 00:26:44,700
All the ingredients
of an epic fire tornado
580
00:26:44,733 --> 00:26:46,800
are now in place.
581
00:26:46,833 --> 00:26:52,633
CLEMENTS:
This was ranked as an E.F.-3,
Enhanced Fujita scale tornado.
582
00:26:52,666 --> 00:26:57,266
I believe this is the strongest
documented fire-induced tornado.
583
00:26:57,300 --> 00:27:01,800
NARRATOR:
Temperatures reach
2,700 degrees Fahrenheit,
584
00:27:01,833 --> 00:27:04,100
hot enough to melt steel.
585
00:27:04,133 --> 00:27:07,366
It lasts for 30 minutes.
586
00:27:07,400 --> 00:27:11,466
CLEMENTS:
We saw things like pipes
wrapped around trees,
587
00:27:11,500 --> 00:27:13,366
flipped-over cars,
588
00:27:13,400 --> 00:27:15,433
power lines that were broken off
589
00:27:15,466 --> 00:27:17,666
from 90-foot towers
that were taken down.
590
00:27:17,700 --> 00:27:20,766
The winds to do that
are extreme.
591
00:27:20,800 --> 00:27:25,433
♪
592
00:27:25,466 --> 00:27:29,700
NARRATOR:
Extreme: a word redefined
by megafires
593
00:27:29,733 --> 00:27:34,966
as they grow in size, frequency,
and impact.
594
00:27:35,000 --> 00:27:36,233
But the destruction they create
595
00:27:36,266 --> 00:27:39,833
makes it easy to overlook
an important point:
596
00:27:39,866 --> 00:27:43,966
fire is an essential part
of a natural cycle
597
00:27:44,000 --> 00:27:46,300
that keeps a forest healthy.
598
00:27:46,333 --> 00:27:47,600
What fire does is,
599
00:27:47,633 --> 00:27:50,500
it essentially releases
nutrients, precious nutrients,
600
00:27:50,533 --> 00:27:52,866
into the ground
601
00:27:52,900 --> 00:27:54,600
so that new plants
can grow and thrive,
602
00:27:54,633 --> 00:27:56,066
and it creates a cycle
603
00:27:56,100 --> 00:27:57,833
where once plants grow enough,
604
00:27:57,866 --> 00:27:59,800
essentially,
they are setting the system up
605
00:27:59,833 --> 00:28:01,633
for a future fire.
606
00:28:01,666 --> 00:28:03,433
♪
607
00:28:03,466 --> 00:28:06,900
NARRATOR:
The concerted effort to stop
that cycle of fire
608
00:28:06,933 --> 00:28:11,233
began more than a century ago.
609
00:28:11,266 --> 00:28:12,600
The modern fire story
in the U.S.,
610
00:28:12,633 --> 00:28:13,633
wildland fire story,
611
00:28:13,666 --> 00:28:14,933
begins in 1910, really.
612
00:28:14,966 --> 00:28:20,033
NARRATOR:
The spring of 1910 brings
severe drought
613
00:28:20,066 --> 00:28:21,333
to the northern Rockies.
614
00:28:21,366 --> 00:28:24,600
(train whistle blowing)
615
00:28:24,633 --> 00:28:27,300
In April, hot coals spewed
from a chugging locomotive
616
00:28:27,333 --> 00:28:30,633
spark fire in western Montana.
617
00:28:30,666 --> 00:28:31,866
In short order,
618
00:28:31,900 --> 00:28:34,433
there are hundreds
of small fires burning there
619
00:28:34,466 --> 00:28:36,233
and in Idaho.
620
00:28:36,266 --> 00:28:39,366
As spring becomes summer,
621
00:28:39,400 --> 00:28:42,266
the drought persists,
the winds pick up,
622
00:28:42,300 --> 00:28:45,433
and the fires grow larger.
623
00:28:45,466 --> 00:28:48,933
3,000 men are
on the front lines,
624
00:28:48,966 --> 00:28:51,166
trying to beat back the flames.
625
00:28:51,200 --> 00:28:53,366
PYNE:
There was an organization,
626
00:28:53,400 --> 00:28:55,633
the U.S. Forest Service,
barely five years old,
627
00:28:55,666 --> 00:28:58,833
that was now charged with
dealing with these large fires.
628
00:28:58,866 --> 00:29:01,333
1910 overwhelmed the system
completely.
629
00:29:01,366 --> 00:29:04,133
Three-and-a-quarter million
acres in the northern Rockies,
630
00:29:04,166 --> 00:29:06,933
most of it concentrated
in a two-day period
631
00:29:06,966 --> 00:29:08,300
called the Big Blowup.
632
00:29:08,333 --> 00:29:10,466
♪
633
00:29:10,500 --> 00:29:12,533
NARRATOR:
The Big Blowup is triggered
634
00:29:12,566 --> 00:29:16,666
when hurricane-force winds turn
those smaller fires
635
00:29:16,700 --> 00:29:19,000
into several giant firestorms.
636
00:29:19,033 --> 00:29:21,566
♪
637
00:29:21,600 --> 00:29:24,133
They leave a path
of devastation,
638
00:29:24,166 --> 00:29:28,566
charring an area
the size of Connecticut.
639
00:29:28,600 --> 00:29:33,166
78 firefighters are killed.
640
00:29:33,200 --> 00:29:37,700
And the history
and ecology of U.S. forests
641
00:29:37,733 --> 00:29:39,766
would be forever changed.
642
00:29:39,800 --> 00:29:41,900
PYNE:
The thinking was,
643
00:29:41,933 --> 00:29:43,266
"We could have stopped
these fires.
644
00:29:43,300 --> 00:29:47,066
"If we'd had more men,
more telephone lines,
645
00:29:47,100 --> 00:29:48,500
"more lookout towers,
646
00:29:48,533 --> 00:29:50,533
"we could have caught
those fires early
647
00:29:50,566 --> 00:29:54,300
and there would not have been
a Big Blowup."
648
00:29:54,333 --> 00:29:56,266
President Roosevelt's attack
on the Depression began
649
00:29:56,300 --> 00:29:58,466
with his emergency conservation
project.
650
00:29:58,500 --> 00:30:00,333
NARRATOR:
During the Great Depression,
651
00:30:00,366 --> 00:30:02,633
Forest Service chief
Ferdinand Silcox
652
00:30:02,666 --> 00:30:05,566
deploys New Deal workers
and money
653
00:30:05,600 --> 00:30:07,966
to reshape the national forests
654
00:30:08,000 --> 00:30:12,000
with roads, lookout towers,
and phone lines.
655
00:30:12,033 --> 00:30:14,333
Then, in 1935,
656
00:30:14,366 --> 00:30:19,000
he announces something
called the 10:00 a.m. policy.
657
00:30:19,033 --> 00:30:20,233
PYNE:
It meant that by 10:00
658
00:30:20,266 --> 00:30:22,133
the morning following
the report of a fire,
659
00:30:22,166 --> 00:30:23,566
you would have that fire
controlled.
660
00:30:23,600 --> 00:30:27,166
So if you found the fire
at 10:00 p.m. Tuesday night,
661
00:30:27,200 --> 00:30:30,066
you would have it controlled
by 10:00 a.m. Wednesday morning.
662
00:30:30,100 --> 00:30:31,500
If you failed Wednesday morning,
663
00:30:31,533 --> 00:30:32,566
then you'd plan
to have it controlled
664
00:30:32,600 --> 00:30:33,900
by 10:00 a.m. Thursday morning.
665
00:30:33,933 --> 00:30:38,033
NARRATOR:
Washington gives
the Forest Service the money
666
00:30:38,066 --> 00:30:40,700
to make the 10:00 a.m. policy
a reality.
667
00:30:40,733 --> 00:30:42,966
PYNE:
So you develop smoke-jumpers.
668
00:30:43,000 --> 00:30:45,033
You develop organized crews.
669
00:30:45,066 --> 00:30:47,566
You put in trails.
670
00:30:47,600 --> 00:30:49,366
"We're going beat
back the fire menace."
671
00:30:49,400 --> 00:30:53,133
NARRATOR:
Over time, the American public
becomes enamored
672
00:30:53,166 --> 00:30:57,666
with the heroic narrative
of smoke-jumpers and hotshots,
673
00:30:57,700 --> 00:30:59,800
while being fed a steady diet
674
00:30:59,833 --> 00:31:01,966
of public service announcements
from Smokey Bear.
675
00:31:02,000 --> 00:31:06,066
Remember, only you can prevent
forest fires.
676
00:31:06,100 --> 00:31:07,833
NARRATOR:
The message seems clear:
677
00:31:07,866 --> 00:31:09,833
Forest fires are the enemy,
678
00:31:09,866 --> 00:31:13,833
to be avoided or attacked
at all costs.
679
00:31:13,866 --> 00:31:15,166
PYNE:
All of the science,
680
00:31:15,200 --> 00:31:16,233
all of the officials,
681
00:31:16,266 --> 00:31:19,000
are very keen
to eliminate fire.
682
00:31:19,033 --> 00:31:20,833
They see no purpose to it.
683
00:31:20,866 --> 00:31:23,166
It's dangerous, it's a nuisance.
684
00:31:23,200 --> 00:31:25,833
"We will find
a modern alternative."
685
00:31:25,866 --> 00:31:31,466
NARRATOR:
But the war on fire creates
some unforeseen consequences.
686
00:31:31,500 --> 00:31:34,366
With the natural cycle
interrupted,
687
00:31:34,400 --> 00:31:37,766
forests become dense
with fuel for fires.
688
00:31:37,800 --> 00:31:40,433
So in the 1960s and '70s,
689
00:31:40,466 --> 00:31:45,400
the seeds of a new kind of
thinking begin to take root.
690
00:31:45,433 --> 00:31:47,333
FINNEY:
It was realized in 1978 or so
691
00:31:47,366 --> 00:31:50,166
that we weren't going to win
by suppressing fire.
692
00:31:50,200 --> 00:31:52,133
We were having more fires,
693
00:31:52,166 --> 00:31:53,466
no matter how much money
we spent,
694
00:31:53,500 --> 00:31:55,733
no matter how much technology
we threw at the fires.
695
00:31:55,766 --> 00:31:58,000
The 10:00 a.m. policy
was abandoned
696
00:31:58,033 --> 00:32:00,300
and a new fire policy
was introduced,
697
00:32:00,333 --> 00:32:03,800
where fire was supposed to be
incorporated more integrally
698
00:32:03,833 --> 00:32:06,200
into wildland management.
699
00:32:06,233 --> 00:32:07,733
NARRATOR:
Instead of all-out war,
700
00:32:07,766 --> 00:32:12,200
it is a more nuanced approach:
701
00:32:12,233 --> 00:32:14,066
prescribed burns encouraged;
702
00:32:14,100 --> 00:32:16,833
wildfires not attacked,
but managed,
703
00:32:16,866 --> 00:32:21,000
allowed to burn
whenever and wherever possible.
704
00:32:21,033 --> 00:32:22,766
But in the real world,
705
00:32:22,800 --> 00:32:26,133
it proves much easier said
than done.
706
00:32:26,166 --> 00:32:27,900
It's hard to find a place
707
00:32:27,933 --> 00:32:30,466
where the new policy isn't
at odds
708
00:32:30,500 --> 00:32:34,200
with a building boom
in the forest.
709
00:32:34,233 --> 00:32:38,300
♪
710
00:32:38,333 --> 00:32:42,700
In August 2018, a case in point
in the Cascade Mountains,
711
00:32:42,733 --> 00:32:44,866
90 miles east of Seattle.
712
00:32:44,900 --> 00:32:47,400
The Cougar Creek Fire is ripping
713
00:32:47,433 --> 00:32:51,100
through the Okanogan-Wenatchee
National Forest.
714
00:32:51,133 --> 00:32:53,533
The area is sparsely populated,
715
00:32:53,566 --> 00:32:56,800
and the fire began
with a lightning strike.
716
00:32:56,833 --> 00:32:57,966
(thunder claps)
717
00:32:58,000 --> 00:33:00,833
It might seem
like the perfect place
718
00:33:00,866 --> 00:33:04,200
to let a fire burn.
719
00:33:04,233 --> 00:33:07,633
But the fire has gotten
very big, very quickly,
720
00:33:07,666 --> 00:33:10,300
and it is heading
toward the small communities
721
00:33:10,333 --> 00:33:11,733
nestled in the forest.
722
00:33:11,766 --> 00:33:14,033
♪
723
00:33:14,066 --> 00:33:16,533
So the man in charge
really has no choice.
724
00:33:16,566 --> 00:33:18,600
Morning, everybody.
725
00:33:18,633 --> 00:33:20,133
NARRATOR:
He has to draw a line
in the woods
726
00:33:20,166 --> 00:33:23,566
and stop the fire
from moving beyond it.
727
00:33:23,600 --> 00:33:25,600
Today is going to be
a busy fire day.
728
00:33:25,633 --> 00:33:27,700
So I ask that mentally
we be there
729
00:33:27,733 --> 00:33:29,166
and be ready for that.
730
00:33:29,200 --> 00:33:32,866
NARRATOR:
Noel Livingston is
a veteran incident commander
731
00:33:32,900 --> 00:33:34,866
for the U.S. Forest Service.
732
00:33:34,900 --> 00:33:38,733
He first started fighting fires
36 years ago.
733
00:33:38,766 --> 00:33:41,500
LIVINGSTON:
How do we manage
this fire problem that we have?
734
00:33:41,533 --> 00:33:42,566
Because we have a fire problem.
735
00:33:42,600 --> 00:33:44,633
We have landscapes
that are out of sync,
736
00:33:44,666 --> 00:33:47,033
and we have people living
in those same landscapes.
737
00:33:47,066 --> 00:33:49,666
The easy solution of,
"Well, let's just let it burn,"
738
00:33:49,700 --> 00:33:52,200
isn't realistic.
739
00:33:52,233 --> 00:33:55,300
NARRATOR:
Today, nearly 100 million
Americans have made the decision
740
00:33:55,333 --> 00:33:57,333
to live in the woods,
741
00:33:57,366 --> 00:34:02,233
what scientists call
the wildland-urban interface.
742
00:34:02,266 --> 00:34:04,066
BALCH:
We love these places,
743
00:34:04,100 --> 00:34:07,333
and yet we're living
with a certain amount of risk
744
00:34:07,366 --> 00:34:09,666
that they will go up in flames.
745
00:34:09,699 --> 00:34:12,600
We're literally putting homes
in the line of fire.
746
00:34:12,633 --> 00:34:15,333
There are hundreds of thousands
of homes
747
00:34:15,366 --> 00:34:18,166
that have been threatened
over the last several decades
748
00:34:18,199 --> 00:34:19,166
by wildfires,
749
00:34:19,199 --> 00:34:21,466
and we expect that to go up.
750
00:34:21,500 --> 00:34:23,100
♪
751
00:34:23,133 --> 00:34:25,800
NARRATOR:
Every firefighter here
at Cougar Creek
752
00:34:25,833 --> 00:34:27,300
knows the bitter irony:
753
00:34:27,333 --> 00:34:29,933
Their success in the short term
754
00:34:29,966 --> 00:34:33,600
might make the people nearby
feel safe living here
755
00:34:33,633 --> 00:34:35,566
and encourage
even more building.
756
00:34:35,600 --> 00:34:38,833
But it is a false sense
of security.
757
00:34:38,866 --> 00:34:41,566
Each time they stop a fire
in its tracks,
758
00:34:41,600 --> 00:34:45,600
fuel for the inevitable
builds up,
759
00:34:45,633 --> 00:34:50,066
and fires are more likely
to become megafires.
760
00:34:50,100 --> 00:34:51,900
LIVINGSTON:
Because we've excluded fire
761
00:34:51,933 --> 00:34:53,866
for the past hundred years
or so,
762
00:34:53,900 --> 00:34:55,666
particularly
in heavily wooded stands,
763
00:34:55,699 --> 00:34:58,933
we're getting more of a
continuous, high-intensity event
764
00:34:58,966 --> 00:35:00,533
in those types of stands.
765
00:35:00,566 --> 00:35:02,966
NARRATOR:
This ups the ante
for firefighters
766
00:35:03,000 --> 00:35:05,966
already doing very risky work.
767
00:35:06,000 --> 00:35:08,900
As the fire grows in strength,
768
00:35:08,933 --> 00:35:12,166
safety officer Jennifer Rabuck
is on a scouting mission
769
00:35:12,200 --> 00:35:13,333
near the fire line.
770
00:35:13,366 --> 00:35:16,433
♪
771
00:35:16,466 --> 00:35:19,866
She aims to strike a balance
between saving homes
772
00:35:19,900 --> 00:35:24,266
and protecting
firefighters' lives.
773
00:35:24,300 --> 00:35:25,500
This is our primary
containment line
774
00:35:25,533 --> 00:35:26,900
that we're walking on.
775
00:35:26,933 --> 00:35:28,700
The fire is off to our right.
776
00:35:28,733 --> 00:35:31,000
Ideally,
we'd like to hold this line.
777
00:35:31,033 --> 00:35:33,266
NARRATOR:
Hot embers from the wildfire,
778
00:35:33,300 --> 00:35:34,833
launched and carried
by the wind,
779
00:35:34,866 --> 00:35:40,333
are flying overhead, landing
in what amounts to kindling.
780
00:35:40,366 --> 00:35:41,900
RABUCK:
You look at some of this,
781
00:35:41,933 --> 00:35:43,033
it's all dry and dead,
782
00:35:43,066 --> 00:35:44,966
and it just flakes off
in your fingers.
783
00:35:45,000 --> 00:35:46,433
There's nothing in here
784
00:35:46,466 --> 00:35:50,333
that has got any sort
of resistance to take.
785
00:35:50,366 --> 00:35:51,700
If an ember lands in here,
786
00:35:51,733 --> 00:35:53,200
this piece of wood is going
to catch fire.
787
00:35:53,233 --> 00:35:58,066
NARRATOR:
The dead, dry wood
is where spot fires start,
788
00:35:58,100 --> 00:36:00,266
but not where they end.
789
00:36:00,300 --> 00:36:04,066
With the temperature high
and the humidity so low,
790
00:36:04,100 --> 00:36:10,266
everything here is dehydrated
and highly flammable.
791
00:36:10,300 --> 00:36:12,766
This is what we call
tree torching
792
00:36:12,800 --> 00:36:14,333
or even group torching.
793
00:36:14,366 --> 00:36:15,500
Single tree would be one,
794
00:36:15,533 --> 00:36:17,966
group torching would be
pockets of trees.
795
00:36:18,000 --> 00:36:20,200
When it's torching,
it starts out on the bottom.
796
00:36:20,233 --> 00:36:23,866
And as those flames grow,
it's sending that heat up
797
00:36:23,900 --> 00:36:27,133
into the live part of the tree,
the green part of the tree,
798
00:36:27,166 --> 00:36:28,466
preheating it,
799
00:36:28,500 --> 00:36:31,966
so it's more receptive
to that build-up and build-up,
800
00:36:32,000 --> 00:36:33,900
and it reaches
a certain combustion point,
801
00:36:33,933 --> 00:36:37,666
where the entire tree
will go up.
802
00:36:40,866 --> 00:36:43,233
And you can see the ember wash
coming off of those,
803
00:36:43,266 --> 00:36:45,066
and you can see how far
it's going over the ridge.
804
00:36:45,100 --> 00:36:46,400
MAN:
Oh, this is a living tree
that's gone up?
805
00:36:46,433 --> 00:36:48,500
This is a living tree.
806
00:36:53,833 --> 00:36:56,000
What goes through your mind
when you see this?
807
00:36:56,033 --> 00:36:59,100
Right now I'm wondering
if we're in a good spot.
808
00:36:59,133 --> 00:37:04,466
NARRATOR:
The Cougar Creek Fire will burn
more than 42,000 acres
809
00:37:04,500 --> 00:37:05,833
before it stops spreading.
810
00:37:05,866 --> 00:37:08,666
But no structures are damaged.
811
00:37:08,700 --> 00:37:14,033
Another victory for the nation's
wildfire fighting force.
812
00:37:14,066 --> 00:37:17,933
They succeed 97% of the time.
813
00:37:17,966 --> 00:37:22,500
♪
814
00:37:22,533 --> 00:37:24,833
A century of excluding fire
815
00:37:24,866 --> 00:37:28,333
has created some unhealthy,
dangerous forests
816
00:37:28,366 --> 00:37:30,633
all over the United States.
817
00:37:30,666 --> 00:37:33,100
♪
818
00:37:33,133 --> 00:37:38,666
But how best to allow forests,
fire, and people to coexist?
819
00:37:38,700 --> 00:37:42,000
Fire ecologist Sharon Hood
is testing some alternatives
820
00:37:42,033 --> 00:37:44,733
in western Montana.
821
00:37:44,766 --> 00:37:45,933
Oh, got the pith.
822
00:37:45,966 --> 00:37:47,633
CHARLOTTE REED:
Nice.
823
00:37:47,666 --> 00:37:52,666
NARRATOR:
This 30-acre plot is part
of a long-term study
824
00:37:52,700 --> 00:37:57,366
to see if there's a better way
to manage our forests.
825
00:37:57,400 --> 00:37:59,366
It hasn't burned in 100 years,
826
00:37:59,400 --> 00:38:02,200
and it is filled with fuel
for a fire.
827
00:38:02,233 --> 00:38:07,666
It's hard just to plow through,
much less do their work.
828
00:38:07,700 --> 00:38:11,200
HOOD:
You basically can't see
through it,
829
00:38:11,233 --> 00:38:12,500
and when you're trying to walk
through it,
830
00:38:12,533 --> 00:38:14,900
you're weaving
through very small trees,
831
00:38:14,933 --> 00:38:17,333
you're stepping
over a lot of logs.
832
00:38:17,366 --> 00:38:21,866
It's the density
that strikes me.
833
00:38:21,900 --> 00:38:26,166
NARRATOR:
The dead and small trees
and the shrubs
834
00:38:26,200 --> 00:38:30,900
are the ingredients, the fuel,
for bigger, more intense fires.
835
00:38:30,933 --> 00:38:33,600
This forest is a tinderbox--
836
00:38:33,633 --> 00:38:37,833
a consequence of a misguided
forest management philosophy.
837
00:38:37,866 --> 00:38:39,066
HOOD:
Our ponderosa pine forests
838
00:38:39,100 --> 00:38:41,700
evolved
with very frequent fires--
839
00:38:41,733 --> 00:38:43,733
on average, every seven years.
840
00:38:43,766 --> 00:38:45,766
So removing fire for 100 years
841
00:38:45,800 --> 00:38:48,666
allows all these little
seedlings to get established.
842
00:38:48,700 --> 00:38:50,566
If fires were coming
through here routinely,
843
00:38:50,600 --> 00:38:54,466
they would kill those seedlings,
creating open conditions.
844
00:38:54,500 --> 00:39:00,333
NARRATOR:
And she has the scientific proof
in the plot next door,
845
00:39:00,366 --> 00:39:03,866
where they thinned out the trees
in 2001,
846
00:39:03,900 --> 00:39:08,866
then started a prescribed burn
in 2002.
847
00:39:08,900 --> 00:39:10,266
You're looking at
this open ponderosa pine forest
848
00:39:10,300 --> 00:39:11,666
16 years later.
849
00:39:11,700 --> 00:39:15,766
The thin-and-burn forest
is all open space.
850
00:39:15,800 --> 00:39:21,500
There's not a lot of fuels,
and you see the larger trees.
851
00:39:21,533 --> 00:39:22,733
♪
852
00:39:22,766 --> 00:39:24,833
NARRATOR:
Back in her lab in Missoula,
853
00:39:24,866 --> 00:39:28,233
Sharon and her team carefully
slice and analyze
854
00:39:28,266 --> 00:39:29,700
the core samples
855
00:39:29,733 --> 00:39:32,400
from the thinned and burned
parcel.
856
00:39:32,433 --> 00:39:37,633
The tree rings tell a story,
if you know how to read them.
857
00:39:37,666 --> 00:39:39,900
Here we have a close-up
of a tree core,
858
00:39:39,933 --> 00:39:44,900
and each light and dark band
is one year's worth of growth.
859
00:39:44,933 --> 00:39:50,266
And you can see, between 1990
and 2000, in this section,
860
00:39:50,300 --> 00:39:52,600
you've got narrow growth rings.
861
00:39:52,633 --> 00:39:56,133
NARRATOR:
Narrow rings mean less growth,
862
00:39:56,166 --> 00:39:59,033
nature's record
of how the trees were faring
863
00:39:59,066 --> 00:40:02,233
before the experiment began.
864
00:40:02,266 --> 00:40:03,733
And then, here in 2001,
865
00:40:03,766 --> 00:40:06,900
there was a thinning, where
we cut about half the trees,
866
00:40:06,933 --> 00:40:10,466
and then in 2002,
there was a prescribed burn.
867
00:40:10,500 --> 00:40:15,966
And you can start seeing really
fat growth rings after that.
868
00:40:16,000 --> 00:40:18,633
♪
869
00:40:18,666 --> 00:40:20,733
NARRATOR:
A forest that is more open
870
00:40:20,766 --> 00:40:23,833
and trees that are larger
and healthier.
871
00:40:23,866 --> 00:40:27,533
Thinning and controlled burning
clearly works.
872
00:40:27,566 --> 00:40:31,500
But is it practical
beyond an experiment?
873
00:40:31,533 --> 00:40:34,400
This type of treatment
that you see here is scalable.
874
00:40:34,433 --> 00:40:35,966
There's no one-size-fits-all,
875
00:40:36,000 --> 00:40:40,433
but thinning is a major tool
that we have
876
00:40:40,466 --> 00:40:45,733
to be able to re-introduce fire
in a safer way.
877
00:40:45,766 --> 00:40:49,533
NARRATOR:
It isn't the answer
in every forest landscape.
878
00:40:49,566 --> 00:40:54,066
And prescribed burning faces
a lot of opposition,
879
00:40:54,100 --> 00:40:56,766
ironically, from the people
most in harm's way,
880
00:40:56,800 --> 00:40:58,600
worried about changing
their view
881
00:40:58,633 --> 00:41:00,400
or breathing the smoke.
882
00:41:00,433 --> 00:41:01,966
PIMLOTT:
When we put a little bit
of smoke in the air
883
00:41:02,000 --> 00:41:03,366
under prescribed fire,
884
00:41:03,400 --> 00:41:05,300
sometimes it can meet a lot
of resistance from the public.
885
00:41:05,333 --> 00:41:09,833
WILLIAMS:
There have been
some prescribed burns
886
00:41:09,866 --> 00:41:11,566
that were supposed to be
small forest treatments,
887
00:41:11,600 --> 00:41:14,000
and then a gust of wind came
at the wrong time
888
00:41:14,033 --> 00:41:17,066
and turned that prescribed burn
into a wildfire.
889
00:41:17,100 --> 00:41:19,766
NARRATOR:
And what about the expense?
890
00:41:19,800 --> 00:41:23,233
Thinning and burning can cost
about $1,000 an acre,
891
00:41:23,266 --> 00:41:26,233
and it's not a one-time fix.
892
00:41:26,266 --> 00:41:29,933
But compared
to the cost of a megafire,
893
00:41:29,966 --> 00:41:32,466
maybe it's an ounce
of prevention.
894
00:41:32,500 --> 00:41:34,566
FALK:
I think by now,
895
00:41:34,600 --> 00:41:37,800
people who live in the forest
or near the forest recognize
896
00:41:37,833 --> 00:41:39,266
that there's going to be a fire
now
897
00:41:39,300 --> 00:41:40,666
or there's going to be a fire
later,
898
00:41:40,700 --> 00:41:42,366
and you can have it
under controlled conditions,
899
00:41:42,400 --> 00:41:43,966
when you can go away
for the weekend,
900
00:41:44,000 --> 00:41:45,300
or you can be running
for your life
901
00:41:45,333 --> 00:41:48,133
watching your house burn down.
902
00:41:48,166 --> 00:41:51,733
NARRATOR:
Humans have created
the megafire monster,
903
00:41:51,766 --> 00:41:54,766
but enlightened
forest management alone
904
00:41:54,800 --> 00:41:56,866
won't stop the infernos.
905
00:41:56,900 --> 00:42:00,166
Because there is another factor
at play,
906
00:42:00,200 --> 00:42:02,800
also with our fingerprint--
907
00:42:02,833 --> 00:42:05,633
climate change.
908
00:42:05,666 --> 00:42:08,633
♪
909
00:42:08,666 --> 00:42:11,433
The Camp Fire has broken
records,
910
00:42:11,466 --> 00:42:14,366
and yet it is only one
of three major incidents
911
00:42:14,400 --> 00:42:16,533
in California right now.
912
00:42:16,566 --> 00:42:17,766
HOON:
We've been going
913
00:42:17,800 --> 00:42:20,100
from fire to fire to fire,
914
00:42:20,133 --> 00:42:21,633
and every time we see it,
915
00:42:21,666 --> 00:42:23,433
it's, like,
"That, that's unbelievable.
916
00:42:23,466 --> 00:42:24,733
"That's unbelievable.
917
00:42:24,766 --> 00:42:26,666
I can't, can't believe
we're seeing this."
918
00:42:26,700 --> 00:42:30,500
NARRATOR:
And in the land
of endless summers,
919
00:42:30,533 --> 00:42:34,533
there is now
an endless fire season.
920
00:42:34,566 --> 00:42:36,933
BRICE BENNETT:
We're in November-- this is...
921
00:42:36,966 --> 00:42:41,533
This is not historically when we
would see fires still occurring.
922
00:42:41,566 --> 00:42:45,333
It would be closer to
the hotter part of the summer,
923
00:42:45,366 --> 00:42:48,033
but they're, they're lasting
into December now.
924
00:42:48,066 --> 00:42:49,500
So it's, it's a fire year.
925
00:42:49,533 --> 00:42:51,333
There's no fire season.
926
00:42:51,366 --> 00:42:53,566
♪
927
00:42:53,600 --> 00:42:55,933
NARRATOR:
A fire year,
928
00:42:55,966 --> 00:43:00,266
year after year after year.
929
00:43:00,300 --> 00:43:02,000
What role do rising temperatures
930
00:43:02,033 --> 00:43:04,166
and changing
precipitation patterns
931
00:43:04,200 --> 00:43:06,300
play in this trend?
932
00:43:06,333 --> 00:43:10,466
In California,
the record wildfires occur
933
00:43:10,500 --> 00:43:13,333
after a historic
six-year drought.
934
00:43:13,366 --> 00:43:15,033
WILLIAMS:
Climate change
935
00:43:15,066 --> 00:43:16,433
is taking a pretty bad drought
936
00:43:16,466 --> 00:43:18,300
and actually causing it to be
937
00:43:18,333 --> 00:43:21,466
on par with the biggest droughts
over the last millennium.
938
00:43:21,500 --> 00:43:23,566
♪
939
00:43:23,600 --> 00:43:27,433
NARRATOR:
To better understand this link
between climate and fire,
940
00:43:27,466 --> 00:43:33,133
paleoecologist Cathy Whitlock
spends a lot of time
941
00:43:33,166 --> 00:43:34,500
in Yellowstone National Park.
942
00:43:34,533 --> 00:43:36,033
WHITLOCK:
It's a nearly pristine ecosystem
943
00:43:36,066 --> 00:43:38,800
where we can really see
these things going on.
944
00:43:38,833 --> 00:43:42,066
NARRATOR:
This is Blacktail Pond.
945
00:43:42,100 --> 00:43:44,366
The layers of mud
beneath this ancient lake bed
946
00:43:44,400 --> 00:43:48,833
have their own story to tell,
going way back in time.
947
00:43:48,866 --> 00:43:50,600
♪
948
00:43:50,633 --> 00:43:54,666
WHITLOCK:
Lakes are great repositories
of environmental information.
949
00:43:54,700 --> 00:43:56,933
Pollen grains land
on the surface of the lake,
950
00:43:56,966 --> 00:43:58,433
and they get buried
in the sediment.
951
00:43:58,466 --> 00:44:01,666
Charcoal from fires gets carried
in the air
952
00:44:01,700 --> 00:44:03,233
and then sinks to the bottom.
953
00:44:03,266 --> 00:44:05,100
And those sediments
are undisturbed,
954
00:44:05,133 --> 00:44:08,966
and so you get a continuous
record of environmental history.
955
00:44:09,000 --> 00:44:11,266
One, two, three.
956
00:44:12,400 --> 00:44:14,300
Keep it straight,
keep it vertical.
957
00:44:14,333 --> 00:44:15,266
All right.
958
00:44:15,300 --> 00:44:17,233
So let's pull it up.
959
00:44:18,233 --> 00:44:19,766
Let it drain,
turn it sideways.
960
00:44:19,800 --> 00:44:21,533
Okay, now we're going
to extrude.
961
00:44:21,566 --> 00:44:23,133
Here it comes.
962
00:44:23,166 --> 00:44:24,133
Nice!
963
00:44:24,166 --> 00:44:25,200
Whoo!
964
00:44:25,233 --> 00:44:27,500
NARRATOR:
Using two types of clues,
965
00:44:27,533 --> 00:44:30,766
she can learn a lot
about the ancient landscape.
966
00:44:30,800 --> 00:44:33,066
WHITLOCK:
Pollen tells us about the plants
that are growing here,
967
00:44:33,100 --> 00:44:35,700
and the vegetation is
one of our best indicators
968
00:44:35,733 --> 00:44:38,033
of what the climate was.
969
00:44:38,066 --> 00:44:41,033
So we can use the pollen record
to reconstruct past climate,
970
00:44:41,066 --> 00:44:44,500
and then we can compare it with
the charcoal record of fires
971
00:44:44,533 --> 00:44:46,866
to see how periods of fire
relate
972
00:44:46,900 --> 00:44:48,800
to periods of climate change.
973
00:44:48,833 --> 00:44:51,333
NARRATOR:
The sediment at Blacktail Pond
974
00:44:51,366 --> 00:44:55,200
allows Cathy to look back
15,000 years,
975
00:44:55,233 --> 00:44:58,066
when the glaciers
from the last ice age retreated
976
00:44:58,100 --> 00:45:00,900
from this area.
977
00:45:00,933 --> 00:45:02,066
Back in her laboratory,
978
00:45:02,100 --> 00:45:04,666
Cathy slices the cores in half
979
00:45:04,700 --> 00:45:06,900
and begins to take
a closer look.
980
00:45:06,933 --> 00:45:09,400
♪
981
00:45:09,433 --> 00:45:12,400
WHITLOCK:
There's a lot going on at
this time period in this lake.
982
00:45:12,433 --> 00:45:16,300
The light-colored layers
are calcium carbonate-rich.
983
00:45:16,333 --> 00:45:18,833
They probably were deposited
by algae
984
00:45:18,866 --> 00:45:20,900
that were producing
this calcium carbonate,
985
00:45:20,933 --> 00:45:22,333
and when that happens,
986
00:45:22,366 --> 00:45:25,333
usually, it happens because
the lake's a little bit warmer.
987
00:45:25,366 --> 00:45:26,766
The dark layers,
988
00:45:26,800 --> 00:45:31,033
I'm seeing little blips of
what look like charcoal to me.
989
00:45:31,066 --> 00:45:33,266
But I suspect there's going
to be a lot of charcoal
990
00:45:33,300 --> 00:45:34,766
all the way through this core.
991
00:45:34,800 --> 00:45:37,200
We just have to look
under a microscope to find it.
992
00:45:37,233 --> 00:45:39,033
♪
993
00:45:39,066 --> 00:45:42,900
NARRATOR:
After they chemically treat and
sift sediment from the core,
994
00:45:42,933 --> 00:45:45,166
they can clearly identify
and tally the charcoal
995
00:45:45,200 --> 00:45:47,566
and the pollen.
996
00:45:47,600 --> 00:45:48,800
♪
997
00:45:48,833 --> 00:45:51,866
I'm seeing
some large pine pollens.
998
00:45:51,900 --> 00:45:54,000
They kind of look
like Mickey Mouse hats.
999
00:45:54,033 --> 00:45:58,100
And some of them, like that one,
is a lodgepole pine, for sure.
1000
00:45:58,133 --> 00:46:01,666
NARRATOR:
She has documented
a long relationship
1001
00:46:01,700 --> 00:46:04,233
between fire and temperatures.
1002
00:46:04,266 --> 00:46:07,166
Over the past 7,500 years,
1003
00:46:07,200 --> 00:46:11,366
fire activity closely correlates
with the climate.
1004
00:46:11,400 --> 00:46:13,233
As temperatures cooled,
1005
00:46:13,266 --> 00:46:17,666
fire activity
gradually decreased.
1006
00:46:17,700 --> 00:46:21,000
But as humans have warmed
the planet in the last century,
1007
00:46:21,033 --> 00:46:24,733
fire frequency
has dramatically increased.
1008
00:46:24,766 --> 00:46:30,000
During the warm, dry,
windy summer of 1988,
1009
00:46:30,033 --> 00:46:31,333
800,000 acres,
1010
00:46:31,366 --> 00:46:33,633
one third of Yellowstone Park,
1011
00:46:33,666 --> 00:46:34,600
burned.
1012
00:46:34,633 --> 00:46:36,700
Her analysis shows
1013
00:46:36,733 --> 00:46:39,366
it was one of the largest
fire seasons here
1014
00:46:39,400 --> 00:46:41,833
in the past 6,000 years.
1015
00:46:41,866 --> 00:46:45,966
If current temperature trends
continue,
1016
00:46:46,000 --> 00:46:47,433
fires of that magnitude
1017
00:46:47,466 --> 00:46:50,066
will likely be more frequent
in the future.
1018
00:46:50,100 --> 00:46:52,733
WHITLOCK:
I think we're moving
into uncharted territory.
1019
00:46:52,766 --> 00:46:54,933
We're seeing warming
at rapid rates,
1020
00:46:54,966 --> 00:46:57,633
we're seeing
extreme fire events.
1021
00:46:57,666 --> 00:47:00,366
We're seeing things that we
just haven't seen in the past,
1022
00:47:00,400 --> 00:47:02,833
and that's my big concern.
1023
00:47:02,866 --> 00:47:04,833
Cory, do you have
all the vials?
1024
00:47:04,866 --> 00:47:08,900
NARRATOR:
Ecologist Monica Turner
has the same concern.
1025
00:47:08,933 --> 00:47:10,233
She and her team
1026
00:47:10,266 --> 00:47:14,866
study Yellowstone's breathtaking
lodgepole pine forests.
1027
00:47:14,900 --> 00:47:15,900
TURNER:
In Yellowstone,
1028
00:47:15,933 --> 00:47:17,700
what I do is try to understand
1029
00:47:17,733 --> 00:47:19,566
how fires affect the forest
1030
00:47:19,600 --> 00:47:21,300
and then
how the forest recovers.
1031
00:47:21,333 --> 00:47:22,600
♪
1032
00:47:22,633 --> 00:47:24,800
NARRATOR:
The fires here in 1988
1033
00:47:24,833 --> 00:47:28,633
were part of the normal,
100-to-300-year burn cycle
1034
00:47:28,666 --> 00:47:30,866
for lodgepole pines.
1035
00:47:30,900 --> 00:47:33,566
Although the fires
were big and severe,
1036
00:47:33,600 --> 00:47:35,933
the forests of Yellowstone
recovered
1037
00:47:35,966 --> 00:47:38,333
in spectacular fashion.
1038
00:47:38,366 --> 00:47:41,266
But in 2000 and again in 2016,
1039
00:47:41,300 --> 00:47:46,666
new fires hit some of the
same areas that burned in '88.
1040
00:47:46,700 --> 00:47:50,733
Monica wonders if climate change
is making it hard
1041
00:47:50,766 --> 00:47:53,033
for the forest to bounce back
once again.
1042
00:47:53,066 --> 00:47:55,766
So that's something like
104 degrees Fahrenheit...
1043
00:47:55,800 --> 00:47:56,700
Whoa.
1044
00:47:56,733 --> 00:47:58,466
MAN:
Just below the surface
here.
1045
00:47:58,500 --> 00:48:00,033
TURNER:
That's hot.
1046
00:48:00,066 --> 00:48:03,100
NARRATOR:
Too much heat, too little shade.
1047
00:48:03,133 --> 00:48:06,066
And what happens
when forests burn again so soon,
1048
00:48:06,100 --> 00:48:08,433
before there is time to recover?
1049
00:48:08,466 --> 00:48:11,433
To find out, they systematically
count and measure
1050
00:48:11,466 --> 00:48:13,400
tree seedlings.
1051
00:48:13,433 --> 00:48:15,500
MAN:
D8 is dead.
1052
00:48:15,533 --> 00:48:18,133
NARRATOR:
And they determine
how far they travel.
1053
00:48:18,166 --> 00:48:20,600
TURNER:
What we are hoping
to find out here is,
1054
00:48:20,633 --> 00:48:22,200
"Will they germinate?
1055
00:48:22,233 --> 00:48:24,166
Are the conditions suitable
for them to grow?"
1056
00:48:24,200 --> 00:48:26,833
NARRATOR:
In this plot,
1057
00:48:26,866 --> 00:48:29,866
where only 16 years
separate two fires,
1058
00:48:29,900 --> 00:48:33,200
young trees
are completely destroyed.
1059
00:48:33,233 --> 00:48:34,233
Only stumps remain,
1060
00:48:34,266 --> 00:48:36,500
and there is on average
a 60% reduction
1061
00:48:36,533 --> 00:48:39,466
in the number of tree seedlings.
1062
00:48:39,500 --> 00:48:44,100
More frequent, more severe fires
and warmer temperatures
1063
00:48:44,133 --> 00:48:47,966
mean new generations of trees
will have a much harder time
1064
00:48:48,000 --> 00:48:48,966
taking root.
1065
00:48:49,000 --> 00:48:51,033
TURNER:
We are now questioning
1066
00:48:51,066 --> 00:48:52,933
how the frequency
and the severity of fires
1067
00:48:52,966 --> 00:48:57,566
may overcome the ability
of the forests to recover.
1068
00:48:57,600 --> 00:49:01,733
If we have future fires
that happen every 15 years,
1069
00:49:01,766 --> 00:49:02,800
I don't know.
1070
00:49:02,833 --> 00:49:06,866
♪
1071
00:49:06,900 --> 00:49:11,233
NARRATOR:
Fire may be integral
to the evolution of forests,
1072
00:49:11,266 --> 00:49:14,766
but the scale and frequency
of today's megafires
1073
00:49:14,800 --> 00:49:16,066
appear to be something new.
1074
00:49:16,100 --> 00:49:18,866
The landscape is changing fast,
1075
00:49:18,900 --> 00:49:23,966
a symptom of climate change
that is more sudden than most.
1076
00:49:24,000 --> 00:49:25,266
WHITLOCK:
Going into the future,
1077
00:49:25,300 --> 00:49:27,600
I think we're going to have
more fires.
1078
00:49:27,633 --> 00:49:30,033
And if we continue to have
more fires,
1079
00:49:30,066 --> 00:49:33,766
it will gradually shift
the composition of the forests.
1080
00:49:33,800 --> 00:49:36,266
In some places,
we may lose forest
1081
00:49:36,300 --> 00:49:38,500
and get more grassland.
1082
00:49:38,533 --> 00:49:41,266
♪
1083
00:49:41,300 --> 00:49:43,933
NARRATOR:
The Camp Fire is still burning,
1084
00:49:43,966 --> 00:49:47,333
but in Paradise,
embers are starting to cool.
1085
00:49:47,366 --> 00:49:49,933
George Gold is headed
through town
1086
00:49:49,966 --> 00:49:53,066
on his way to Magalia,
just to the north.
1087
00:49:53,100 --> 00:49:56,700
He already knows
his house is destroyed,
1088
00:49:56,733 --> 00:49:58,366
but what happened
to the sports car
1089
00:49:58,400 --> 00:50:00,866
that he left a mile away
in a parking lot?
1090
00:50:00,900 --> 00:50:05,566
Finding out is his main goal
today.
1091
00:50:05,600 --> 00:50:07,400
(gasps):
There is my car!
1092
00:50:07,433 --> 00:50:08,733
I see my car!
1093
00:50:08,766 --> 00:50:11,133
(laughing)
1094
00:50:11,166 --> 00:50:13,133
It's there.
1095
00:50:13,166 --> 00:50:15,133
Can you believe it?
1096
00:50:15,166 --> 00:50:18,366
(laughing)
1097
00:50:18,400 --> 00:50:22,433
My Miata is alive.
1098
00:50:24,066 --> 00:50:25,466
(engine starting)
1099
00:50:25,500 --> 00:50:27,600
A-ha, she lives!
1100
00:50:27,633 --> 00:50:30,200
(laughing)
1101
00:50:30,233 --> 00:50:32,800
NARRATOR:
It's time to see
1102
00:50:32,833 --> 00:50:34,833
if there's anything
worth salvaging at home.
1103
00:50:34,866 --> 00:50:37,433
GOLD:
This was my neighborhood,
and there's nothing left.
1104
00:50:37,466 --> 00:50:39,566
There's, there's no neighborhood
here.
1105
00:50:39,600 --> 00:50:41,600
There's just debris.
1106
00:50:41,633 --> 00:50:46,066
I mean, it was gorgeous here,
just gorgeous.
1107
00:50:46,100 --> 00:50:48,233
Peaceful, quiet.
1108
00:50:49,700 --> 00:50:51,366
(exhales):
My shed's there,
1109
00:50:51,400 --> 00:50:55,766
so I can do my gardening.
1110
00:50:55,800 --> 00:50:59,366
And this is my front door,
right here.
1111
00:50:59,400 --> 00:51:01,000
(stone and metal scraping)
1112
00:51:01,033 --> 00:51:02,866
Open the door.
1113
00:51:05,133 --> 00:51:08,433
I mean, I never considered
myself a materialistic person.
1114
00:51:08,466 --> 00:51:10,633
I mean, if you went in my house,
you would say,
1115
00:51:10,666 --> 00:51:12,300
"Gee, you're kind of living
a spartan life," right?
1116
00:51:12,333 --> 00:51:15,233
No fancy stuff,
just basic stuff.
1117
00:51:15,266 --> 00:51:17,600
But the stuff I had,
I loved it, right?
1118
00:51:17,633 --> 00:51:19,100
Every time I walked in the door,
I thought,
1119
00:51:19,133 --> 00:51:21,666
"Oh, wow, this is my house.
1120
00:51:21,700 --> 00:51:23,533
I've made it, I'm in heaven."
1121
00:51:23,566 --> 00:51:24,900
And I had all these tool boxes.
1122
00:51:24,933 --> 00:51:28,066
You know, I spent 30 years
gathering tools.
1123
00:51:28,100 --> 00:51:30,466
Here we go.
1124
00:51:30,500 --> 00:51:32,100
(laughing)
1125
00:51:32,133 --> 00:51:34,933
They may live again.
1126
00:51:34,966 --> 00:51:37,566
Maybe.
1127
00:51:37,600 --> 00:51:39,733
I think not.
1128
00:51:39,766 --> 00:51:41,166
It's really hard.
1129
00:51:41,200 --> 00:51:43,733
I don't know what to do--
I don't know what to think.
1130
00:51:43,766 --> 00:51:45,700
I've never experienced
anything like this.
1131
00:51:45,733 --> 00:51:47,900
I don't know what to think,
I don't know what to do,
1132
00:51:47,933 --> 00:51:49,933
I don't know what to feel.
1133
00:51:49,966 --> 00:51:52,633
♪
1134
00:51:52,666 --> 00:51:54,200
I don't know--
I'm no youngster anymore.
1135
00:51:54,233 --> 00:51:56,666
I don't know
if I'll ever recover.
1136
00:51:56,700 --> 00:51:58,800
(sighs)
1137
00:51:58,833 --> 00:52:02,500
♪
1138
00:52:07,300 --> 00:52:09,166
(sighs)
1139
00:52:09,200 --> 00:52:14,200
♪
1140
00:52:16,800 --> 00:52:19,133
Major funding for "NOVA"
is provided by the following:
1141
00:52:47,200 --> 00:52:49,900
To order this "NOVA" program
on DVD,
1142
00:52:49,933 --> 00:52:54,800
visit ShopPBS
or call 1-800-PLAY-PBS.
1143
00:52:54,833 --> 00:52:58,766
This program is also available
on Amazon Prime Video.
1144
00:52:59,433 --> 00:53:00,366
♪
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