President Donald Trump has declared a major disaster in Northern California, where wildfires have killed at least 15 and burned thousands of homes and stores to the ground.
The declaration freed up millions of dollars in emergency federal aid.
Trump said he let Governor Jerry Brown know that "the federal government will stand with the people of California. And we will be there for you in this time of terrible tragedy and need."
As of late Tuesday afternoon, 17 large wildfires were burning in an area north of San Francisco that's famous for its vineyards and wine. Firefighters said cooler weather was helping them make progress, but that high winds and dry conditions were still causing a problem.
More than 46,000 hectares (114,000 acres) have been destroyed so far, and thousands of people have been left homeless, many fleeing only with the clothes on their backs.
Among the dead were a 100-year-old man and his 99-year-old wife, who were unable to get out of their Napa home in time.
The cause of the wildfires was unknown, but extremely strong and dry Santa Ana winds blow across the valley from the mountains in the late summer and early fall, posing a very high risk for California wildfires.