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.

Multiple wildfires are burning on the Western Slope, forcing evacuations and darkening the sky across the state. With most of western Colorado under a high fire danger warning, hundreds of firefighters are working in sweltering conditions, with highs in the 90s and no rain in the forecast for the foreseeable future .