About a dozen homes were threatened by a grass fire south of Horseshoe Bend Thursday afternoon, but fire engines from Boise, Meridian and Eagle were dispatched to help protect the homes. The roughly 100-acre fire destroyed a barn, but all of the homes were spared.

At 5:20 p.m., a BLM fire information officer said most of the active flames had been knocked down. Residents were allowed back into the homes between 6:30 p.m. and 7 p.m. The fire was expected to be contained by 9 p.m. and controlled on Friday.

Firefighters will stay at the scene of the fire — called the Summit fire — through the night. The fire was reported at 2:20 p.m. Thursday about 6 miles south of Horseshoe Bend near Old Horseshoe Bend Road.

The Horseshoe Bend Fire Department responded to the fire and requested assistance from the Bureau of Land Management. BLM has sent six engines, a dozer, and a water tender. They have also ordered helicopters and planes to drop fire retardant.

A red flag warning is in affect for much of Southwest Idaho. That means conditions are ripe for explosive fire growth. The National Weather Service says there may be scattered lightning in the Treasure Valley and the Owyhees from 3 p.m. Thursday to 6 a.m Friday.

Fire investigators are at the scene. A cause had not yet been determined, but Hampton said it has been determined to be human-caused.

At 7:30 p.m. Thursday, the BLM dispatched four engines and fire retardant aircraft to a fire on the west side of CJ Strike Reservoir. Hampton said firefighters were able to quickly get the upper hand on the fire. The cause of the fire is unknown; investigators are at the scene.