Smoke from the wildfire near Yosemite National Park reached Lake Tahoe and parts of the Bay Area and Nevada on Monday, but is not expected to affect Southern California.
The Oak Fire grew to 16,791 acres, making it the largest wildfire in California so far this year. The blaze reached 10% containment, according to the California Department of Forestry and Fire Protection, known as Cal Fire.
Gov. Gavin Newsom proclaimed a sate of emergency in Mariposa County, where at least 10 structures were destroyed and more than 3,000 remained threatened. Many roads, including part of state route 140, a major gateway into Yosemite, were closed.
Cal Fire said more than 2,000 fire personnel were fighting to control the blaze from the air and ground.
The Oak Fire began Friday afternoon near the community of Midpines between Yosemite and Mariposa and quickly spread to the Sierra National Forest. Cause of the fire is unknown.