Smoke from wildfires burning in northern Ontario and the Prairies of Canada caused poor air quality and reduced visibility in ...

Parts of Canada are seeing some of their most unhealthy air yet, and the smoke is likely to move over the United States again ...

Toxic metals, including arsenic, could be released by Canadian wildfires, posing health risks to those downwind.

Environment Canada says wildfire smoke conditions in Eastern Ontario and Western Quebec are expected to continue into ...

Smoke from wildfires in Canada has spread more than 5,000 miles, reaching parts of Russia and Europe during the past week.

More than 200 wildfires are raging across Canada, sending a thick blanket of choking smoke through the U.S. Midwest. Experts ...

Environment Canada issued a special air quality statement for Toronto and most of Ontario due to the smoke from wildfires ...

Canadian wildfires continue to burn, and plumes of smoke linger over Michigan. Air quality advisories, alerts on June 5.

The country's legacy of mining means that toxic metals could be carried along plumes of smoke, endangering people in its path ...

Wildfires scorching several Canadian provinces have driven at least 33,400 people from their homes, with smoke now reaching ...

In addition to the eastern US, the smoke from the fires has caused air quality to drop to unhealthy levels in parts of the ...