County Fire grows to 60,000 acres, threatens 700 buildings

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A wildfire that's threatening 700 homes and buildings in rural Northern California continues to grow explosively as firefighters struggle in rough terrain to contain it.

No homes have burned but the blaze is surging through sparsely populated areas of Yolo and Napa counties about 50 miles (80 kilometers) from the state capitol of Sacramento. 

As of Monday night, flames had devoured 60,000 acres of tinder-dry grass, brush and oak. That's nearly 94 square miles (about 243 square kilometers) -- nearly the size of Sacramento. According to Cal-Fire the wildfire is 5 percent contained. 

The so-called County Fire erupted Sunday and at times has grown by 1,000 acres an hour.

Smoke and ash are contributing to poor air quality in the San Francisco Bay Area and California wine country.

Hot, dry conditions are fueling blazes in several states in the U.S. West. 

Mandatory evacuations are as follows: 

North of Highway 128 in Yolo County, not including the City of Winters.
South of County Road 23 
East of Berryessa Knoxville Road 
West of County Road 89, South of the community of Esparto, however agricultural equipment will be permitted
Residences served by Highway 128, between Monticello Dam and Pleasant Valley Road

Evacuation Advisory: 
North of Quail Canyon Road
South of Highway 128
East of the Blue Ridge mountains
West of Pleasant Valley Road
For questions regarding Yolo County evacuations or advisories, please dial 2-1-1