David McNew/Getty Images

A Los Angeles County Fire Department helicopter drops water near an inmate hand crew cutting a containment line on a ridge at the Williams fire in the Angeles National Forest on September 4, 2012 north of Glendora, California. The fire began late September 2, putting an early end to Labor Day weekend camping and hiking for vacationers, who were evacuated from the area as it spread to more than 4,000 acres in size. Officials project that it will take at least another week to establish a containment line around the fire which is burning in rugged and difficult to reach backcountry.