Firefighters mop up hot spots while battling California's Oak Fire.
Mandatory Credit: Noah Berger/Associated Press
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California's Oak Fire destroys at least 41 structures as it burns more than 18,000 acres near Yosemite National Park
California's Oak Fire has burned through more than 18,000 acres and destroyed at least 41 structures since it ignited near California's Yosemite National Park Friday, as fire crews battle overwhelmingly dry conditions and steep terrain, officials say.
