Smoke billowing from wildfires is leading to poor air quality and reducing visibility throughout Manitoba this ...

Wildfire smoke degrades air quality in swaths of Ontario, with Toronto ranking among the worst in the world on Monday.

Air quality warnings are in effect for much of Manitoba this weekend as wildfire smoke continues to linger over the region.

Multiple U.S. states and Canadian provinces are experiencing poor air quality from wildfire smoke. Here's where.

Smoke from wildfires in Manitoba, a Western province facing its worst fire season in 30 years, has created hazardous air ...

Environment Canada has issued a special air quality statement Saturday morning, warning of wildfire smoke in the region for ...

Fine particle levels are expected to reach the purple air quality index category, which means it is considered “very ...

Intense wildfires in Canada’s western provinces continued blazing Wednesday, sending smoke southward and triggering air quality alerts throughout the United States. More than 400 wildfires are ...

Air quality alerts are triggered by a number of factors, including the detection of fine-particle pollution - known as “PM 2.5” - which can irritate the lungs.

The Michigan Department of Environment, Great Lakes, and Energy issued southeast Michigan's sixth air quality advisory of the ...

Air quality over the US and Canada is slowly getting better. ... Philadelphia’s air quality index exceeded 150 early Friday, making it “unhealthy,” according to the monitoring website AirNow.