Rapid growth on the South Rim fire in Black Canyon of the Gunnison National Park forced immediate evacuations in Montrose County on Saturday afternoon.

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

A wildfire that's burning in the southern part of Black Canyon of the Gunnison National Park in western Colorado has grown to more than 1,600 acres. It has damaged some park equipment and several outbuildings.