“Air quality and visibility due to wildfire smoke can fluctuate over short distances and can vary considerably from hour to ...

Smoke from wildfires blazing across Canada is once again wafting over huge portions of the U.S. Midwest and worsening air ...

The Midwest saw some of the worst air quality conditions in the world Thursday, and similar conditions are expected to ...

The smoke is expected to remain over the northern and central Plains of the United States for the next couple of days, ...

The Iowa Department of Natural Resources reported Friday that air quality in Iowa will be at levels “unhealthy for sensitive ...

Wildfire smoke from Canada is blanketing the skies in the Midwest, leaving millions with dangerous breathing conditions.

Smoke from raging wildfires in Canada is causing air quality alerts to blanket the Midwest. Lissette Nuñez is live from Chicago's Lollapalooza music festival.

Chicago air quality remains in the top five worst in the world Friday with an Air Quality Alert in place from Canadian ...

Smoke and grit from hundreds of forest fires have spread across large parts of Canada and the northern US, sending air quality across the Midwest and northeast US and Toronto to unhealthy levels.

Smoke from Canadian wildfires prompted a special air‑quality statement for Toronto and warnings nationwide, urging residents to limit outdoor time amid poor air and hazy skies.

Canadian wildfires in Manitoba and Saskatchewan have prompted air quality alerts in Minnesota, Wisconsin and Michigan on ...

Wildfire smoke from the Prairies prompted special air quality statements and warnings across the country Saturday.