More than three and a half thousand structures have been destroyed and hundreds of people are missing as the fires burn across eight counties.
Fires have burnt out more than 77,000 hectares.
However, firefighters have begun to gain ground against the spread of wildfires.
Daniel Berlant, assistant deputy director of the California Department of Forestry and Fire Protection says overall, they are definitely making progress, adding that the situation was less dire than earlier in the week.
Nearly two dozen blazes spanning eight counties have raged largely unchecked since igniting on Sunday night, scorching an area nearly the size of New York City.
The firestorms rank among the deadliest and most destructive in California’s history.
The official cause of the disaster is under investigation, but power lines knocked down by gale-force winds may have sparked the conflagration.