Investigators determine that a power line caused the Thomas Fire

The fire burned 281,893 acres near Santa Barbara, destroyed 1,063 structures, and caused the death of one civilian and one firefighter

Thomas Fire
Thomas Fire, Ventura, CA, Los Padres National Forest, 2017. USFS photo.

The Ventura County Fire Department (VCFD) has determined that an arcing power line caused the Thomas Fire that destroyed 1,063 structures and caused the death of a civilian and a firefighter.

Investigators found that strong winds on December 4, 2017 forced Southern California Edison power lines to come in contact with each other, resulting in molten metal falling to the ground which ignited vegetation. The common term for this is “line slap.”

Measured east to west the Thomas Fire spread for over 42 miles, stretching between Fillmore and Santa Barbara in Southern California.

map Thomas Fire
Map of the west side of the Thomas Fire. The red line was the perimeter on December 23, 2017. Click to enlarge.

CAL FIRE Fire Apparatus Engineer Cory Iverson of the San Diego/San Diego County Fire Authority was overrun by fire and killed December 14, 2017 while battling the blaze. A 70-year-old woman died in a car accident while fleeing the fire on December 6, 2017.

At one point nearly 9,000 emergency personnel were working on the fire.

The investigative team was comprised of four agencies: CAL FIRE, Ventura County Sheriff’s Office, Santa Barbara County Fire Department, and the U.S. Forest Service.

Author: Bill Gabbert

After working full time in wildland fire for 33 years, he continues to learn, and strives to be a Student of Fire. Google+

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