Oak Fire near Yosemite National Park forces evacuations in California - USA TODAY

The Oak Fire erupted Friday in Mariposa County, where a state of emergency was declared Sunday. It's one of the state's largest fires this year.

One of California's biggest wildfires this year exploded to over 21 square miles Sunday, forcing thousands to flee remote mountain communities as the blaze near Yosemite National Park burned out of c… [+2276 chars]

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