NAPA COUNTY, Calif. -- More than a dozen wind-whipped wildfires continue to rage across Wine Country, burning buildings, forcing hundreds of evacuations and injuring several people, reports CBS San Francisco.

On Monday, Gov. Brown issued a state of emergency for Napa, Sonoma and Yuba counties due to the effects of the wildfires.    

California's fire chief says at least 1,500 homes and commercial buildings have been destroyed in wildfires that have ripped through the state's wine country.

He says numerous people have been injured and a number of residents are also missing as 14 large fires burn.

California Department of Forestry and Fire Protection Director Ken Pimlott say an estimated 20,000 people have been evacuated.

The Atlas Peak fire was the largest, quickly growing to more than 200 acres near Napa.

Meanwhile, a fire near Calistoga had burned several buildings, sent several people to the hospital to be treated for burns and prompted mandatory evacuations along several roads. 

Early Monday morning, the Sonoma County Sheriff's Department said fires had also erupted in Santa Rosa, Windsor and Sebastopol.

The fires had stretched Sonoma and Napa counties firefighting resources to the breaking point. A call for mutual aid was issued to other Bay Area fire departments.

The National Weather Service had issued a red flag warning for the Bay Area early Sunday, predicting gusty winds and dry conditions. Gusts were predicted to be in the 30 mph range in the area of the fires.

Continue reading at CBSNews.com.