Toronto is among the most polluted cities in the world on Sunday morning as much of Ontario remains under an air quality ...

The Air Quality Index (AQI), a system used to communicate how much pollution is in the air, is expected to reach the red or ...

The state Department of Environmental Conservation has issued an air quality health advisory for Sunday due to smoke from ...

The Grey Bruce Region is under a special air quality statement. Environment Canada says the smoke from forest fires is ...

For the full 24 hours of Aug. 3, the New York State Department of Environmental Conservation is issuing an air quality health ...

Wildfire smoke from the Prairies has prompted special air-quality statements and warnings across the country Saturday.

Smoke from Canadian wildfires hovered over several Midwestern states Saturday, bringing warnings of unhealthy air ...

Wildfire smoke from the Prairies has prompted a special air-quality statement over much of northern Ontario Saturday.

Commissioner Amanda Lefton and State Department of Health (DOH) Commissioner Dr. James McDonald are issuing an Air Quality Health Advisory for fine particulate matter on Sunday for the Western New ...

This is the second-most severe wildfire season in Canadian history, after 2023, with 15 million acres burned so far.

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

Air quality levels and a distinct smoky smell filled the skies over much of the province through the day Thursday. While ...