An air quality health advisory is in effect in Mesa, Delta and Montrose counties through Thursday, and the Colorado Department of Public Health and Environment has issued an ozone action day alert for ...

The air was cleaner, but probably not clean enough to get Metro Denver back into compliance with federal ozone standards.

Wildfires in northwestern Colorado have grown to more than 30,000 acres with no containment reported for the largest blazes. The Lee Fire has crossed 22,000 acres, while the Elk Fire is approaching ...

The wildfires that started in Rio Blanco County have forced more evacuations as the damage wrought by this season’s wildfires approaches 190,000 acres. Three of the eight largest fires in the state ...

A haze of smoke from wildfires burning in Colorado wafted into counties along the Interstate 70 mountain corridor on Wednesday, prompting an air quality health advisory. The smoke is from four ...

A smoky haze wafted over parts of western Colorado on Thursday from wildfires burning in and around the state. The smoke is mainly from the Turner Gulch Fire in Mesa County and the Dragon Bravo Fire ...

Several rounds of wildfire smoke have been moving into Denver, Boulder, Fort Collins and communities up and down the I-25 corridor this week. Most of the smoke is coming from three active wildfires on ...