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

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

The Chicago area recorded ozone levels of 156 late Monday afternoon. Levels above 100 are considered unhealthy. Residents ...

Scattering sunlight, disrupting bees, damaging plant tissue - farmers can’t always offset the effects of smoky days ...

Environment Canada urges residents to limit their time outdoors. But even when inside, most buildings can only reduce ...

Western winds have pushed smoke plumes from Prairie wildfires toward Quebec and Ontario, including Toronto and the GTA ...

(The Center Square) – Wisconsin’s northernmost congressman is fed up with smoke and haze from Canada. Congressman Tom Tiffany ...

Some business owners say the emergency alert for the Waskesiu area in Saskatchewan was blown out of proportion by media, ...

The Canadian government’s Wildfire Smoke Fine Particulate Matter map models wildfire smoke for July 15-17, 2025. It shows ...

As record wildfires erupt across Canada this year, with health-threatening smoke drifting into the U.S. and as far away as ...

Canadian wildfire smoke lingers in Michigan. Officials issued an air quality advisory in southeast Michigan for July 15.