MARIPOSA, Calif., Aug. 26 (UPI) -- A main entrance to Yosemite National Park was closed Friday while firefighting crews battled a wildfire near Mariposa, Calif., officials said.
Officials said the so-called Motor fire in the Merced River Canyon had burned about 1,000 acres since it broke out Thursday, KMPH-TV, Fresno, Calif., reported.
CNN said the fire was triggered by an exploding propane tank.
"We are in full response right now," Rebecca Garcia of the Sierra National Forest told CNN.
No injuries had been reported, officials said.
Residents south of the park's maintenance station were evacuated, officials said. Highway 140 north of Midpines to the park was close and drivers were told to use an alternate route.
About 70 structures and 35 outbuildings were threatened by the blaze, officials said.