“Air quality and visibility due to wildfire smoke can fluctuate over short distances and can vary considerably from hour to ...

A system approaching the region will wrap thick smoke onto the southern Prairies and portions of southern Ontario into this ...

Hot weather is expected to linger for several more days, with forecasters warning of soaring temperatures and humidity across Ontario. Mississauga, Brampton, Halton, Hamilton and Durham are among the ...

A stretch of southern Ontario remains under a special air quality statement today amid smoke from wildfires burning in parts ...

Millions of Americans are under air quality alerts as wildfires burn in Canada. Experts say the weather pattern could change by early next week, and stress the need to take precautions until then.

It says the push is part of a broader heat stress strategy looking at how climate change is impacting working conditions ...

How to stay safe from air pollution PM2.5 is a mixture of chemicals that change based on what’s burning, Anenberg said. It’s possible some of the wildfire plume may contain toxic compounds ...

Thick plumes of smoke from dozens of wildfires raging in Ontario, Canada, are billowing across the US border, compromising the air quality for millions of residents in Wisconsin, Minnesota and Iowa.

Every air quality monitor in Minnesota is reporting red or unhealthy conditions for everyone, an official said.

An Ontario labour group says it is advocating for more robust worker protections amid growing health concerns over poor air quality, as wildfire smoke blankets the province with increasing frequency.

The city had among the worst air quality in the world for a time on Wednesday and officials warned that poor air quality in the area would likely last into Friday. By Dan Bilefsky Toronto has ...