An air quality alert is in effect for some parts of Massachusetts on Thursday as temperatures hit the 90s — and thunderstorms ...

The U.S. Environmental Protection Agency warns that wildfire smoke contains dangerous pollutants in the form of fine ...

As hundreds of wildfires burn across Canada, smoke is traveling south and potentially affecting Americans’ health. Here's why ...

Unfortunately, it’s a product in increasing and borderless abundance across North America and the world, endangering lives ...

Smoke from wildfires burning in three Canadian provinces covered about a third of the U.S. on Wednesday, forecasters said, ...

Smoke from Canadian wildfires began to worsen air quality in the eastern U.S. on Wednesday as several Midwestern states ...

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

Smoke from the Canadian wildfires continues to bring dangerous air quality to parts of the northern U.S., with hazy skies ...

Canada is having another bad wildfire season, and more than 27,000 people in three provinces have been forced to evacuate.

See where Canadian wildfire smoke and a plume of dust from the Sahara Desert in Africa will hover over the U.S. East Coast ...

Tracking how that smoke will move from Canada, or when it's going to cause problems at the surface, isn't easy.