The festival kicked off Thursday, when Chicago had the worst air quality in the world for a few hours. But haze didn't choke ...

Forecasters extended a weekend statewide air quality advisory into Monday because they expect smoke from Canadian wildfires to linger over the state and cause unhealthy levels of particle pollution.

Smoke and grit from hundreds of forest fires have spread across large parts of Canada and the northern US, sending air quality across the Midwest and northeast US and Toronto to unhealthy levels.

The smoky air is predicted to reach New York City on Monday, and it could bring unhealthy air quality for sensitive groups.

Health officials from Minnesota to Maine have issued alerts warning of poor air quality from wildfires burning in Canada.

Air quality alerts were in effect in Iowa, Minnesota, Wisconsin and Michigan, as well as eastern Nebraska and parts of ...

An elevated flooding risk persists on Sunday for some parts of the Southeast as Alabama, Georgia and the Florida Panhandle ...

Air quality alerts had been issued for nine states as of Sunday morning, with residents in some areas advised to combine errands in order to help reduce pollution levels.

Smoke and grit from hundreds of forest fires have spread across large parts of Canada and the northern US, sending air quality across the Midwest and northeast US and Toronto to unhealthy levels.

Smoke from the more than 700 wildfires burning in Canada is continuing to blanket parts of the Midwest for a final day.

Minneapolis faced hazardous air quality, ranking second-worst globally due to Canadian wildfire smoke. Air quality alerts ...