A 1-acre wildifre has broken out in southwest Fort Collins near Horsetooth Reservoir.

The fire burning directly east of Horsetooth Rock — at approximately 3300 Centennial Drive — and is sending up thick column of smoke.

High afternoon temperatures — at 2:30 p.m. it was 98 degrees — will likely fuel the fire’s growth. Multiple fire engines have responded to the area.

The smoke is blowing north along the hogback separating Fort Collins from Horsetooth Reservoir. The fire is moving northwest, according to police radio communications.

Structures are threatened, according to police radio communications, and reverse 911 calls are planned. Authorities are closing Centennial Drive.

Source: Fort Collins Coloradoan