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

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

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

Much of Central Canada, Manitoba and Saskatchewan were placed under special air quality statements or warnings on Monday due ...

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

Much of Central Canada, Manitoba and Saskatchewan were placed under special air quality statements or warnings on Monday due to smoke from wildfires.

With various air quality indexes available, and as wildfire smoke becomes an increasing health risk, here’s what often goes ...

Summer camps and daycares are being forced to shift their plans amid stifling heat and poor air quality caused by wildfire ...

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

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

While some organizations have published clear air quality thresholds or contingency protocols for wildfire smoke, FIFA's ...