A fast-moving brush fire near Yosemite National Park exploded in size Saturday into one of California’s largest wildfires of the year, prompting evacuation orders for thousands of people and shutting off power to more than 2,000 homes and businesses.
The Oak Fire started Friday afternoon southwest of the park near the town of Midpines in Mariposa County and by Saturday had grown to nearly 19 square miles, according to the California Department of Forestry and Fire Protection, or Cal Fire. It erupted as firefighters made progress against an earlier blaze that burned to the edge of a grove of giant sequoias in the southernmost part of Yosemite park.
Evacuation orders were put in effect Saturday for over 6,000 people living across a several-mile span in the sparsely populated, rural area, said Daniel Patterson, a spokesman for the Sierra National Forest.
Gov. Gavin Newsom proclaimed a state of emergency for Mariposa County on Saturday due to the effects of the Oak Fire.
More than 400 firefighters were battling the blaze, along with helicopters, other aircraft, and bulldozers, facing tough conditions that included hot weather, low humidity, and bone-dry vegetation caused by the worst drought in decades, Patterson said.
“Explosive fire behavior is challenging firefighters,” Cal Fire said in a statement Saturday that described the Oak Fire’s activity as “extreme with frequent runs, spot fires, and group torching.”
By Saturday morning, the fire had destroyed 10 residential and commercial structures, damaged five others and was threatening 2,000 more structures, Cal Fire said. The blaze prompted numerous road closures, including a shutdown of Highway 140 between Carstens Road and Allred Road—blocking one of the main routes into Yosemite.
California has experienced increasingly larger and deadlier wildfires in recent years.
“The fire is moving quickly. This fire was throwing embers out in front of itself for up to 2 miles yesterday,” Patterson said. “These are exceptional fire conditions.” The cause of the fire was under investigation.
The fire broke out July 7 and forced the closure of the southern entrance to Yosemite and evacuation of the community of Wawona as it burned on the edge of Mariposa Grove, home to hundreds of giant sequoias, the world’s largest trees by volume.