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

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

In Canada, the Air Quality Health Index (AQHI) is a scale developed to help people understand what the current air quality ...

And even if you don’t feel any discomfort on your run, it doesn’t mean there’s no harm being done. The pollutants can have ...

Canada had some of the worst air quality in North America on Tuesday morning according to waqi.info, the website for the ...

Unhealthy air has invaded Minnesota, Wisconsin and North Dakota early this week as a new round of wildfire smoke from Canada ...

Wisconsin’s northernmost congressman is fed up with smoke and haze from Canada. Congressman Tom Tiffany was on social media ...

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

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

Toronto and the GTA are under a heat wave and poor air quality warning issued by Environment Canada on July 14, 2025, due to ...