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Aerial attack to continue on Angeles National Forest fire

Nick Ut / AP

A Los Angeles County Firefighter helicopter drops water on a wildfire burning through 3,600 acres of the Angeles National Forest on Tuesday Sept. 4, 2012 near Glendora, Calif.

NBC News staff and wire reports: A brush fire in the San Gabriel Mountains that prompted the evacuation of campers and picnickers in the hills above Glendora, Calif., continued to rage Tuesday and it could be several days before crews gain the upper hand.

"We have some challenges we face out there," Tony Imbrenda, of the Los Angeles County Fire Department, told NBCLosAngeles.com. "We expect that this is going to take several days to get some containment." Continue reading the full story.

David McNew / Getty Images

A firefighting air tanker flies over flames at the Williams fire in the Angeles National Forest on Tuesday.

Damian Dovarganes / AP

Blazes in multiple states threaten houses and cause evacuations.