The Hilton Sonoma is among the hundreds of structures that have been burned by wildfires in California's wine country.

A Twitter video shows a part of the hotel engulfed in flames. The Hilton sits on 13 acres in Santa Rosa, about 55 miles north of San Francisco. 

Hilton confirmed that the hotel "sustained damage as a result of the fire."

"Please be advised our hotel is currently closed due to the wild fires in Santa Rosa," the hotel posted on its Facebook page at about 8 a.m. on Monday. "All guests and associates were safely evacuated."

California Gov. Jerry Brown on Monday declared a state of emergency for Napa, Sonoma and Yuba counties because of at least two fires that started in Napa County on Sunday and have since spread to other counties. The Los Angeles Times, citing local officials, estimated on Monday morning that wildfires had burned hundreds of structures and almost 50,000 acres. Officials imposed a mandatory evacuation of thousands of residents in the area.

Last year, Napa Valley attracted about 3.5 million visitors, up 6.3% from 2015, according to Visit Napa Valley. The Napa Valley is home to about 400 wineries, while neighboring Sonoma County has about 200.

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