Heavy winds that swept through Black Canyon of the Gunnison National Park on Sunday night started “rapid fire spread” after a relatively slow day of growth, according to fire officials.

Firefighters are trying to contain several more fires on the Western Slope, and air quality alerts are in effect for much of the state.

The fire burning since Thursday in Black Canyon of the Gunnison National Park is now at more than 3,500 acres and is still 0% contained, National Park Service officials said in a Sunday update.