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

The heat warning issued last Friday for the Ottawa-Gatineau region should last until Thursday night, according to Environment ...

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

Wildfire season is upon us, and smoke is reducing air quality through swaths of the country. Environment Canada suggests ...

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

Environment Canada is warning of poor air quality and extreme heat in Toronto on Monday as southern Ontario braces for a week ...

Windsor-Essex, Chatham-Kent and Sarnia-Lambton can all expect elevated air pollution levels again Tuesday. Environment and ...

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

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

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

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