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 ...

TORONTO - The poor air quality that has blanketed swaths of central and Western Canada is not only infiltrating the lungs, ...

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

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 ...

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

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

Environment Canada identifies the people at particular risk as seniors, infants, folks who work up a sweat outdoors, and ...

Special air-quality statements caused by wildfire smoke remain in effect for many areas of the country, and in some places, ...