GROVELAND, Calif. (AP) -- A massive wildfire on the northern border of Yosemite National Park is edging closer to a reservoir that supplies drinking water for San Francisco, some 150 miles away.
Despite ash falling like snowflakes on the reservoir and a thick haze of smoke, utility officials say water quality remains good.
The city's hydroelectric power generated by the system has been interrupted by the fire and that's forced the utility to buy power on the open market.
Hundreds of firefighters have been called out to protect communities along the path of the huge wildfire.
The fire has consumed some 225 square miles of forest and is one of the largest fires in California history.
Fire officials say the blaze has slowed up a bit but is still advancing, and is only 7 percent contained.