San Francisco, Aug 19 (AP) Thousands of people were under orders to evacuate in regions surrounding the San Francisco Bay Area Wednesday as some 30 wildfires blazed across the state amid a blistering heat wave now in its second week. Smoke blanketed the city of San Francisco.

“Throughout the state of California right now, we are stretched thin for crews” because of the fires, said Will Powers, a state fire spokesman.

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“Air resources have been stretched thin throughout the whole state.”

Police and firefighters went door-to-door early Wednesday in a frantic scramble to warn residents to evacuate as fire encroached on Vacaville, a city of about 100,000 that lies between San Francisco and Sacramento.

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Television footage showed some homes in flames and thick ash dropping in a rural area near Interstate 80 as the fire appeared to head toward more densely populated areas.

Diane Bustos told KPIX-TV that she and her husband tried to drive out but their vehicle caught on fire and they had to flee on foot.

“I got all these flames on me and I lost my shoe, but I made it. God saved me," she said.

The California Department of Forestry and Fire Protection said the blaze was exhibiting “extreme fire behavior" and challenging firefighters.

As part of the same fire complex, thousands of homes and businesses were threatened in the wine-growing counties of Napa and Sonoma in an area devastated by a series of deadly blazes in the last three years.

At least seven fires were grouped together as one of two major Lightning Fires in Northern California, a nod to their origins just a day earlier.

Powers said much of the fire was burning through rural areas with steep terrain, making it difficult to get crews in.

In Napa County, Gail Bickett, 80, loaded up her three dogs in a truck to evacuate as the fire burned behind houses across the road, the San Francisco Chronicle reported.

“It's scary,” she said.

“It's overwhelming.” Blazes engulfed rural and forest areas near the San Francisco Bay Area, near Salinas in Monterey County, around Oroville Dam north of Sacramento, forested areas west of Silicon Valley, in remote Mendocino County and near the Nevada state line north of Lake Tahoe.

Several also were burning in northern coastline areas and in Southern California.

Gov Gavin Newsom ordered a statewide state of emergency Tuesday.(AP)

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