The fire — called the Twelve fire on the Bureau of Land Management’s fire dashboard — burned across 1,000 acres over the course of five hours Wednesday after sparking in Moffat County near Elk Springs, about 50 miles west of Craig, according to federal officials.

Four fires burning on Colorado’s Western Slope have spread to more than 31,000 acres and forced ongoing evacuations, fire officials said Wednesday.

More than 30,000 acres in northwest Colorado have been destroyed by the Lee and Elk fires since Aug. 2. See the updates.