Wildfire smoke was helping raise ozone to hazardous levels. No alerts have been issued, but the air quality may approach ...

An air quality index of 300 or higher is considered hazardous, and the record-breaking smoke AQI in Grand Portage reached 800 ...

Smoke will likely be an ongoing health hazard across North America for the next few months. Here's what to expect.

More than 200 wildfires are blazing across central and western Canada, half of which are out of control because they’re so ...

Wildfires are burning around Canada. Here’s where wildfire smoke is across the country and how kids can protect themselves.

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

More smoke and dust are ahead for the northern, eastern and southern states into mid-June, as AccuWeather meteorologists ...

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

Smoke from Canadian wildfires continues to plague the Upper Midwest and Great Lakes region, with multiple states under air ...

Canada has one of the world's largest forests. It's experiencing heat and drought. It's a recipe for wildfires — and for ...

Air quality alerts and advisories have been issued in multiple states as Canadian wildfire smoke continues to spread.

Many fires burning across Canada, forcing evacuations and threatening air quality in the United States, cannot simply be put ...