Firefighters battle flames off Highway 154 north of Santa Barbara, California, U.S. November 25, 2019, in this picture obtained from social media. Mandatory credit Mike Eliason/Santa Barbara County Fire Department/via REUTERS

Flames dwarf a telephone pole during a wildfire dubbed the Cave Fire burning in the hills of Santa Barbara, California, U.S., November 26, 2019.

Santa Barbara City firefighter Erik Adair battles flames near a home off Cieneguitas Rd in Santa Barbara, California, U.S. November 25, 2019, in this picture obtained from social media. Mandatory credit Mike Eliason/Santa Barbara County Fire Department/via REUTERS

Embers rise during a wildfire dubbed the Cave Fire burning in the hills of Santa Barbara, California, U.S., November 26, 2019.

A Los Angeles Fire Department Engine is seen on Highway 154 during operations to battle flames in the nearby hillside, Santa Barbara, California, U.S. November 26, 2019, in this picture obtained from social media. Mandatory credit Mike Eliason/Santa Barbara County Fire Department/via REUTERS

Firefighters battle flames off Highway 154 north of Santa Barbara, California, U.S. November 25, 2019, in this picture obtained from social media. Mandatory credit Mike Eliason/Santa Barbara County Fire Department/via REUTERS

Firefighters battle flames off Highway 154 north of Santa Barbara, California, U.S. November 25, 2019, in this picture obtained from social media. Mandatory credit Mike Eliason/Santa Barbara County Fire Department/via REUTERS

Firefighters battle a wildfire dubbed the Cave Fire burning in the hills of Santa Barbara, California, U.S., November 26, 2019.

Firefighters are enveloped in heavy smoke as they combat a wildfire dubbed the Cave Fire burning in the hills of Santa Barbara, California, U.S., November 26, 2019.

Flames rise near trees during a wildfire dubbed the Cave Fire burning in the hills of Santa Barbara, California, U.S., November 26, 2019.

An air tanker drops fire retardant over a wildfire, dubbed the Cave Fire, burning in the hills of Santa Barbara, California, U.S., November 26, 2019.

A firefighting DC10 aircraft known as 10 Tanker Air Carrier drops fire retardant near mountain homes at a wildfire dubbed the Cave Fire, burning in the hills of Santa Barbara, California, U.S., November 26, 2019.

A man rushes to move his van as flames approach from a wildfire dubbed the Cave Fire, burning in the hills of Santa Barbara, California, U.S., November 26, 2019.

A man retreats from flames at a wildfire dubbed the Cave Fire, burning in the hills of Santa Barbara, California, U.S., November 26, 2019.

Firefighters watch approaching flames at a wildfire dubbed the Cave Fire, burning in the hills of Santa Barbara, California, U.S., November 26, 2019.

A charred landscape is left by a wildfire dubbed the Cave Fire, burning in the hills of Santa Barbara, California, U.S., November 26, 2019.

A bulldozer works at the scene of the Cave fire in Los Padres National Forest near East Camino Cielo, Santa Barbara, California, U.S. November 25, 2019, in this picture obtained from social media. Mandatory credit Mike Eliason/Santa Barbara County Fire Department/via REUTERS

A helicopter battles flames off Highway 154 north of Santa Barbara, California, U.S. November 25, 2019, in this picture obtained from social media. Mandatory credit Mike Eliason/Santa Barbara County Fire Department/via REUTERS

Embers blow from a burned tree during a wildfire dubbed the Cave Fire burning in the hills of Santa Barbara, California, U.S., November 26, 2019.

A wildfire dubbed the Cave Fire burns in the hills of Santa Barbara, California, U.S., November 26, 2019.

A lizard that appears to have survived the fire under dirt emerges at a wildfire dubbed the Cave Fire, burning in the hills of Santa Barbara, California, U.S., November 26, 2019.

Crime scene tape and a fire hose are seen as investigators try to determine the cause of a wildfire dubbed the Cave Fire, burning in the hills of Santa Barbara, California, U.S., November 26, 2019.