Smoke from more than 100 wildfires burning across Canada has been rolling into North American cities far from the flames. New York City and Detroit were both listed among the five most polluted cities ...

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 ...

SEATTLE — Expect to see increased wildfire smoke in the Puget Sound region this weekend that could diminish air quality amid several days of hot temperatures. Smoke from the Island Creek Wildfire near ...

Air quality alerts are in place again for the entire Western Slope as firefighters battle more than 20 fires. The Colorado Department of Public Health has issued two air quality health advisories for ...

DENVER — After Denver and most of Colorado experienced their warmest day of the week on Thursday, a cold front moved through Thursday night. The front brought significantly cooler temperatures and ...

Wildfire smoke from the Pacific Northwest is causing hazy skies and poor air quality in Fort Collins. An air quality warning was issued for the Front Range Urban Corridor through at least Sept. 5. The ...