A wildfire on the outskirts of California's Yosemite National Park has forced hundreds of people to flee their homes and threatened water supplies to four towns.
The 1,850 acre blaze is burning near the town of Darby in Calaveras County.
The fire, which broke out Wednesday afternoon, was burning heavy brush and timber about two miles (3.2 kilometers) from the small Hathaway Pines community 25 miles (40.2 kilometers) northwest of Yosemite.
Fire officials said the blaze threatened 500 homes, 50 businesses and 100 outbuildings and was 10 percent contained Thursday evening.
It was one of two major wildfires that had burned more than 14,000 acres of brush and timber in Northern California.
Another smaller fire in Butte County forced evacuations Thursday morning.
The Darby fire forced evacuations in about 150 homes in the nine communities and one area was put on alert.
At least 60 people spent the night at an evacuation center set up at a nearby elementary school in the town of Murphys.
The wildfire has destroyed a portion of an aboveground canal that provides water to four communities; Angels, Vallecito, Douglas Flat and Murphys, leaving residents with an estimated two-day storage of water.
They were advised to limit water use.
About 820 firefighters dug into steep, rocky terrain, using bulldozers, chain saws and shovels to strip away heavy brush and cut down trees to make a line around the fire.
A smaller wildfire in Butte County forced residents of more than 100 homes to evacuate in a power outage Thursday.
A bulldozer operator was injured and airlift ed from the blaze and two buildings were destroyed.
Meanwhile, a major wildfire known as the Star Fire continued to burn Thursday burning along the Middle Fork of the American River.
More than 2,100 firefighters were fighting that blaze, which has burned more than 12,730 acres of brush and pine.