(FOX NEWS) A massive wildfire racing through the Yosemite wilderness — fueled by high winds — is threatening San Francisco’s fresh water and power supply as well as California’s iconic giant sequoias.

It’s one of several fires statewide being fought by more than 8,000 firefighters across nearly 400 square miles. The fire, which began on Aug. 17 and has grown to become one of the largest in state history, has consumed approximately 225 square miles of picturesque forests and officials estimate containment at just 7 percent.

“This fire has continued to pose every challenge that there can be on a fire,” said Daniel Berlant, a spokesman with the California Department of Forestry and Fire Protection. “It’s a very difficult firefight.”

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