DENVER (KDVR) — A brush fire in Glenwood Springs threatened structures and prompted evacuations in the area Saturday afternoon.

The Glenwood Springs Fire Department and several other agencies responded around 1:30 p.m. GSFD said the fire was approximately 1 acre at the time, with large flames and heavy smoke.

The fire covered some 4.5 acres as of Sunday afternoon. GSFD monitored the fire overnight and continued operations Sunday.

Neighbors near the Mountain Shadows subdivision were advised by the Garfield County Sheriff’s Office at 2:20 p.m. to evacuate immediately. GCSO asked all people and small animals to go to the Glenwood Springs mall.

“Quick action from initial attack and mutual aid resources were paramount in the suppression of this fire. The utilization of air resources gave command insight into fire behavior and helicopter bucket drops cooled hot spots so ground crews could access and extinguish as the terrain was steep,” incident commander Jesse Hood said.

Evacuations were lifted at about 5 p.m Saturday and roads were reopened, GCSO said. No injuries were reported, and the cause of the fire is being investigated.