One person was killed in a fire further north, in Mendocino County.
In southern California, a fast-moving wildfire in Anaheim is forcing some evacuations. Workers quickly moved patients to other nearby hospitals. A Hilton Hotel was smoldering and in ruins.
Napa County Public Information Kristi Jourdan (cq) told Wine Enthusiast, "We're now at zero containment for Atlas Peak".
"Imagine a wind-whipped fire burning at explosive rates".
Fountaingrove Inn, Santa Rosa: The 124 room luxury hotel, which was visible from Highway 101, "fell victim to the devastating fire in Sonoma County", according to a message general manager Justin Hayman posted on Facebook.
In Sonoma County, Santa Rosa's city manager declared the fires a local emergency. In Napa County, evacuations were underway as firefighters battled blazes. Three evacuation centers have been set up.
Cal Fire, the state agency, said the Atlas Fire in Napa County was near Atlas Peak Road and had blackened at least 200 acres. In that blaze, 23,000 acres were burned, $36 million was done in damage, 65 structures were destroyed and 11 people were injured.
"We were sleeping, but we kept smelling smoke. It's something that we're having to be very cautious about", she said.
Two women hug as they watch houses burn in Santa Rosa, Calif., Monday, Oct. 9, 2017.
"There power was out so we had to raise our garage door by hand", she said.
Officials said Sonoma County emergency dispatchers were being "overwhelmed by 911 calls" from residents smelling smoke, adding, "Please only call 911 if you see actual unattended flames".
Additional updates to come from our reporters on the ground as the story unfolds.. "I really, I feel very sad".
The National Weather Service had issued a red flag warning for the Bay Area early Sunday, predicting gusty winds and dry conditions.
Forecasters said winds will remain strong on Monday morning but are expected to ease by midday. The Crosswalk Church was opened earlier as a evacuation center, but it's at capacity.