Bone-dry conditions in an area that has not seen a major fire in more than 60 years pushed a Southern California wildfire from 45,000 acres to more than 100,000 acres in a matter of hours Monday, fire officials said.
The Station fire, burning in Angeles National Forest north of Los Angeles, has forced thousands of evacuations and threatened thousands of structures -- including major communications installations on Mount Wilson, said Mike Dietrich, the U.S. Forest Service's incident commander.
"This is a very difficult firefight," Dietrich said. "This is a very angry fire that we're fighting right now. Until we can get a change in weather conditions, I'm not overly optimist." 
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CNN's Rob Marciano, Chad Myers, John Torigoe and Stephanie Chen contributed to this report.
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