About half the country is under active heat advisories again on Tuesday, affecting more than 168 million Americans, according ...

A cold front is bringing storms and lower temperatures to parts of the country, while the Midwest sees poor air quality from ...

Smoke from hundreds of wildfires in Canada has choked the skies over dozens of northern U.S. states in the Great Lakes and ...

Smoke from Canadian wildfires is causing air quality concerns for millions of Americans in the Midwest and Northeast.

The Midwest saw some of the worst air quality conditions in the world Thursday, and similar conditions are expected to ...

A record-breaking heat dome has engulfed much of the U.S. this week, pushing temperatures to dangerous highs from the Midwest to the mid-Atlantic. According to AccuWeather, highs in the upper 90s ...

Here's everything you need to know about the heat wave. 'Rare' and 'dangerous': Record-smashing heat wave to scorch tens of millions. National heat index map: See which states feel hottest The map ...

Severe and extreme heat-related impacts are expected across a wide swath of the U.S. this weekend and next week.

Severe weather threats are present across the Midwest and East, as of Monday, July 21, with Illinois, Indiana, Ohio, Kentucky and West Virginia all facing the possibility of flash flooding and ...

The map also showed purple for “very unhealthy" across much of the Minneapolis-St. Paul metropolitan area, where the Air Quality Index numbers of 250 and were common, though conditions started ...