Napa and Sonoma counties were under siege from several fires that raced through wine country Sunday, fueled by powerful winds that are sending flames into populated areas.

Numerous structures were burned Sunday night near the town of St. Helena in Napa County, and officials were worried as flames moved toward Sonoma County and Santa Rosa. This is the same region hit by historic fires in 2017 that destroyed thousands of homes and killed dozens.

On Sunday night, Napa County officials expanded the mandatory evacuation zone to include a portion of the town of St. Helena on the southwestern side of Napa Valley, an area which includes a campus of the Culinary Institute of America, a renowned culinary college.

The evacuation order means that the hills on both sides of Napa Valley, flanking the towns of St. Helena and Calistoga, are threatened by fire. Farther southwest, Sonoma County officials ordered mandatory evacuations in the Mayacamas Mountains west of St. Helena and into the eastern fringes of the city of Santa Rosa, including the site of the Juvenile Justice Center on Rancho Los Guilicos Road.

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