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

When wildfires burn, the smoke can travel long distances and degrade air quality far away, which presents risks for those ...

For the full 24 hours of Aug. 3, the New York State Department of Environmental Conservation is issuing an air quality health ...

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.

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.

Smoke from Canadian wildfires hovered over several Midwestern states Saturday, bringing warnings of unhealthy air ...

Blazes across several Canadian provinces and territories pose health risks to Canadians and their southern neighbours.

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

An air quality statement is in effect for Toronto and the surrounding region as wildfire smoke continues to drift south, ...

Minneapolis faced hazardous air quality, ranking second-worst globally due to Canadian wildfire smoke. Air quality alerts ...