(FOXNews) - Several raging wind-whipped fires forced evacuations Monday in California's famed wine country, as Gov. Jerry Brown declared a state of emergency and officials estimated at least 1,500 homes and commercial buildings were destroyed.

California Department of Forestry and Fire Protection Director Ken Pimlott said an estimated 20,000 people have been evacuated as 14 large fires burn. The fires are burning throughout an eight-county swath of Northern California, including Napa, Sonoma and Yuba counties.

There were no initial reports of injuries or deaths, according to Napa County Fire Chief Barry Biermann.