A fire engine with the Los Angeles County Fire Department protects Camp Williams Mobile Home Park as a wildfire burns across the road on the hillside above in the Angeles National Forest near Glendora, California, Sept 3, 2012. A 4,000-acre (1,620-hectare) wildfire in the Angeles National Forest in Southern California has forced the evacuation of some campsites as firefighters struggle to control the blaze, authorities said on Monday. [Photo/Agencies]

A wildfire burns the hillside during sunset in the Angeles National Forest near Glendora, California, Sept 3, 2012. [Photo/Agencies]