A wildfire raging for a second day Saturday in central California's Mariposa County outside Yosemite National Park has burned nearly 12,000 acres.

Iran PressAmerica: The fire, which had 0% containment as of Saturday evening, began Friday in the foothills of the Sierra Nevada near the small community of Midpines, roughly a 9-mile drive northeast of the county seat, the town of Mariposa, state fire officials said.

Flames tore through trees and sent thick smoke into the sky Friday, and in at least one rural area burned close to homes and parked vehicles, video from CNN affiliates KFSN and KGO showed.

The fire has destroyed at least 10 structures and damaged another five, the California Department of Forestry and Fire Protection, known as Cal Fire, said Saturday. The blaze is threatening 2,000 other structures, Cal Fire said.

It had burned 6,555 acres by Saturday morning, according to Cal Fire. Fire activity was extreme, and emergency personnel were working to evacuate people and protect buildings, the department said.

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