Thousands evacuate as California wildfires kill 10

"We're going to have to start over completely," Dreama Goldberg, who fled her home - now a heap of ashes - at eight months pregnant, told NBC.

Jesus Torres told CBS he barely had time to grab a few things and run from his home.

"We could see the sky was getting red: we did not know it was fire until the last second because there was just smoke everywhere," he said.

The Hilton Hotel in Santa Rosa said on Facebook that its staff and guests were evacuated safely.

"The wildfires in Santa Rosa, California and the surrounding areas have forced the evacuation and temporary closure of Hilton Sonoma Wine Country," it said on Facebook.

"All guests and associates of the Hotel have been safely evacuated and are not able to return until further notice. It is anticipated that the Hotel has sustained significant damage."

Pacific Gas & Electric said more than 196,000 customers had initially lost elecricity although half had had their power restored.

"As of 3.00 pm (2200 GMT), we have about 99,000 customers out of power throughout our service area, with the majority of them in Sonoma and Napa counties," it said.

Coffey Park, a sprawling Santa Rosa neighbourhood with dozens of homes, was also charred in the strong winds and low humidity fire experts said were more like fires in southern California.

Cheri Sharp told Oregon-based TV news channel KOBI her home of 26 years in Santa Rosa was among those destroyed."All our pictures are gone. Everything, everything is gone. We've got a fire pit. It's pretty awful," she said.

"But we're all healthy and safe, and we have to try and be grateful for that. But it's pretty awful."

Marian Williams of Kenwood, in Sonoma County, told NBC Bay Area she joined a convoy of neighbours driving through the flames before dawn as one of the fires reached the area's vineyards.

"It was an inferno like you've never seen before," Williams told the station.

Governor Brown in April declared the official end of the state's drought that lasted more than five years.

But the state is still dealing with the Santa Ana winds, a meteorological phenomenon which brings dry winds down from the high mountains east of the coastal areas - a recipe for perfect wildfire conditions.

Forest fires are common in the western United States during dry, hot summer months.

Last month, a massive fire described as the biggest in the history of Los Angeles forced hundreds to evacuate their homes.

Early Monday, the fires could be smelled in San Francisco, about 60 kilometres from the closest.