More than 600 firefighters on Sunday continued battling a wildfire in the Angeles National Forest above Glendora, amid scorching temperatures and arid conditions.

The Cabin Fire began Friday afternoon about 3 miles north of Highway 39 and Rincon Red Box Road, in San Gabriel Canyon. Two days later, it had burned 1,448 acres of heavy brush and was 20 percent contained, according to the U.S. Forest Service.

No evacuation orders were in place Sunday afternoon. Firefighters were protecting structures in the Crystal Lake Recreation Area and along Highway 39, which was closed between the San Gabriel Dam and Highway 2, the Forest Service said in a statement. The closure was expected to last at least until Monday.

The blaze was burning in a remote location marked by steep and rocky terrain. According to the National Weather Service, temperatures in the area reached as high was 106 degrees with 15 percent humidity.

Ten of the 639 fire personnel at the scene have suffered minor injuries, most of them heat-related, said Battalion Chief Marc Peebles, spokesman for the Southern California Interagency Incident Management Team.

The firefighters were supported by seven helicopters, including one heavy helitanker, Peebles said. Fixed-wing aircraft that had been making water drops on the Cabin Fire were reassigned to another blaze that was burning in Central California’s Inyo National Forest.