The official start of summer is still weeks away — but experts are already warning residents to brace for a hot, stormy ...

The Bay Area is under an air quality advisory on Monday and Tuesday due to wildfire smoke drifting through the region from ...

Wildfire smoke exposure increases lung cancer patients' risk of dying, especially for non-smokers, but certain treatments may ...

Wildfire smoke is spreading throughout Central Canada and into parts of the U.S., with air quality warnings being issued in ...

“Most of the time, the smoke will be high-flying and dim the sun, leading to vivid sunrises and sunsets and causing a hazy ...

Most mail delivery was suspended in Winnipeg Monday and city employees working outdoors were given extra breaks, as the worst ...

As hundreds of wildfires continue to burn in Canada, the smoke from the flames is bringing potentially dangerous air quality to parts of the United States.

Wildfire smoke from Canada is drifting into the U.S., bringing hazy skies and air quality concerns to parts of Pennsylvania ...

The worst wildfires in decades are tearing through Saskatchewan, Canada, and at least two people have been killed in blazes ...

Air quality is expected to reach the maroon air quality index category in northwest Minnesota, which is hazardous for ...

The Bay Area is under an air quality advisory on Monday and Tuesday due to wildfire smoke drifting through the region from ...

Smoke from more than 100 wildfires blazing in Canada is expected to spread to impact air quality in more U.S. state.