Though much of the wildfire smoke will remain high up in the atmosphere, a portion will mix with air on the surface, ...

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

Many communities in Arizona, Michigan, Illinois, New York and across North America are experiencing poor air quality due to ...

With wildfire smoke in the forecast, track the drop in air quality across dozens of PurpleAir sensors with our live, updating ...

Tuesday’s air quality warning has dropped to a 5, considered a moderate risk, down from Monday’s peak of 10+ on the Air ...

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

Today isn’t our first brush with Canadian wildfire smoke. But it’s easily one of most noticeable. Today is the first time ...

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

Their neighbor’s house was on fire. They complained about the smoke. The smoke was terrible. Over the weekend, it blew in ...

Though the Maine DEP expects a large amount of smoke to move out on Wednesday, the smoke will not entirely clear out of Maine ...

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