ANGELES NATIONAL FOREST (CNS) - Efforts were underway today to clear vegetation around a brush fire that burned some 1,800 acres near the Cogswell Dam in the Angeles National Forest north of Azusa.
The fire was reported at 12:22 p.m. Sunday near the dam and West Fork Day Use area, according to a Los Angeles County Fire Department dispatcher.
The blaze was originally reported at about 10 acres, but the U.S. Forest Service updated the report said the fire -- dubbed ``Bobcat Fire'' -- had burned 1,800 acres ``with a rapid rate of spread'' and was a second-alarm blaze as of 6:30 p.m.
As of Sunday night, the fire was 0% contained, fire officials said.
Structures were threatened, according to Angeles National Forest officials, who said five engines, three hand crews, four helicopters, five fixed-wing aircraft and two water tenders were assigned to the fire.
Caltrans reported State Route 39 was closed in both directions from El Encanto Park near Cogswell Dam and the West Fork Picnic Area and Bridge.
A temporary flight restriction was in place over the fire area, and a large plume of smoke could be seen in many parts of L.A. County Sunday afternoon.
Temperatures in the forest were well above 100 degrees.