More than 1,200 firefighters aided by water-dropping helicopters battled a wildfire raging out of control in Northern California, threatening homes and other structures as thick black smoke drifted across the San Francisco Bay Area.
The so-called County Fire, which broke out on Saturday, June 30, afternoon in Yolo County west of Sacramento, has already blackened more than 50 square miles of grass, brush and dense scrub oak.
Crews worked through the night to cut control lines around the blaze, which grew by one-third overnight Sunday, and officials ordered evacuations in several Yolo County communities. The smoke reached San Francisco, 75 miles (120 km) to the south, leaving films of ash on cars and windows.
The blaze, the worst of more than a dozen wildfires burning across the state, was only 3 percent contained as of Monday afternoon and was burning into Napa and Lake Counties as well. No casualties had been reported.
Wildfires have burned through nearly 2.5 million acres (1 million hectares) in the United States as of June 29, well above the average of about 2 million acres for the same calendar period over the last 10 years, according to the National Inter-agency Fire Center, a monitoring group.