Devastating California wildfire grows near Yosemite National Park amid sweltering temperatures

As the blaze in Yosemite National Park grew out of control in the sweltering heat and low humidity Sunday, 

it became one of California's largest wildfires this year, spreading to an area of more than 21 square miles and forcing hundreds of people to abandon remote mountain settlements.

In Mariposa County, close to the tiny community of Midpines, the Oak Fire started on Friday. 

The largest and most famous sequoia grove in the park, the Washburn Fire, which was 12 miles east of Yosemite, was under attack by firefighters

After two weeks of firefighting, the Washburn Fire was 87 percent controlled, but the Oak Fire was still uncontained as of Sunday night, according to Cal Fire.

The organisation also sent out 23 water tenders, 58 dozers, 225 fire engines, and 17 helicopters to battle the Oak Fire.

Ashes were being blown into tree branches by light breezes, and Fouts noted that the dry conditions made it simple for spot fires to start and feed the growth.

More than 3,100 homes and businesses in the area lost power, according to Pacific Gas & Electric, and there was no word on when it would be restored.