HWY 30 fire

Firefighters extinguish hot spots at the scene of a wildfire that ignited Wednesday afternoon along Highway 30 on Fish Creek Summit in Caribou County.

Firefighters got some help from cold Thursday morning temperatures in their successful effort to extinguish a wildfire burning south of Bancroft.

The 20-acre fire in the Fish Creek Summit area of Caribou County was declared to be out at about 11 a.m. Thursday, authorities said.

Thursday morning temperatures in the 20s and 30s were a major reason that firefighters were able to extinguish the blaze, according to Caribou County emergency management officials.

The wildfire was reported by a passing motorist around 3:30 p.m. Wednesday along Highway 30 on Fish Creek Summit near Lund Road, authorities said.

The fire burned away from the highway and spread into the adjacent hilly terrain.

Firefighters from the Caribou County and Bancroft fire departments and the Bureau of Land Management and Forest Service responded to the fire.

The blaze did not result in any injuries or evacuations, and no structures were threatened or damaged.

The fire burned sage brush and juniper trees on private land and did not result in any road closures.

Authorities said the cause of the fire remains under investigation, but they believe it might have been related to vehicle traffic on Highway 30 because it ignited along the highway.