As Southern California enters its second week engulfed in flames, fire officials anticipate more growth and danger due to continued strong wind gusts, no rain and decades-old dry vegetation.
A powerful flare-up on the western edge of the largest and most destructive wildfire sent residents fleeing, as wind-fanned flames ripped down hillsides toward coastal towns northwest of Los Angeles. New evacuations were ordered as the fire sent up an enormous plume near Montecito and Carpinteria, seaside areas in Santa Barbara County.
Containment increased Sunday on other major blazes in Los Angeles, Riverside and San Diego counties. Resources from those fires were diverted to the Santa Barbara foothills to combat the 699 square kilometre) fire which started December 4 in neighbouring Ventura County.
High fire risk is expected to last into January.
The air thick with acrid smoke, even residents of areas not under evacuation orders took the opportunity to leave, fearing another shutdown of US 101, a key coastal highway that was closed intermittently last week. Officials handed out masks to residents who stayed behind in Montecito, the wealthy hillside enclave that's home to celebrities such as Oprah Winfrey, Jeff Bridges and Rob Lowe.
Ojai experienced hazardous levels of smoke at times and officials warned of unhealthy air for large swaths of the region. The South Coast Air Quality Management District urged residents to stay indoors if possible and avoid vigorous outdoor activities.
In San Diego, which is 209sq km to the south, the Lilac Fire was 75 per cent contained. The flames erupted suddenly in the Fallbrook area, known for its avocado groves and horse stables in the rolling hills.
The fire swept through the San Luis Rey Downs training centre, where it killed more than 40 elite thoroughbred race horses, and destroyed more than 100 homes - most of them in a retirement community. Three people were burned trying to escape the fire that continued to smoulder.
Despite the size and number of wildfires burning in the region, there has only been one confirmed death: A 70-year-old woman, who crashed her car on an evacuation route, is attributed to the fire in Santa Paula, a small city where the Thomas Fire began.
Most of last week's fires were in places that burned in the past, including one in the ritzy Los Angeles neighbourhood of Bel-Air that burned six homes and another in the city's rugged foothills above the community of Sylmar and in Santa Paula.