In a recent study, his team estimated that if the world warms about 1.8 degrees Fahrenheit more, a total area roughly the size of the U.S. could reach temperatures that cross this dangerous threshold ...

Tuesday’s heat came on top of 39 new or tied heat records Monday. But just as dangerous as triple-digit heat is the lack of cooling at night, driven by the humidity.

The heat waves moving in recent days across Canada, the U.S. and northern Europe are part of a dangerous new climate pattern.

Summer is just getting started, and millions of people are under heat advisories as a major heat wave spreads across large ...

Extreme heat makes it especially hard for your body to cool down, so you need to be extra careful if you exercise or play ...

Extensive triple digit heat, broken temperature records and oppressive humidity piled up into a steaming mess as the heat ...

Tens of millions of Americans sweltered outside or sought air-conditioned refuge as an "extremely dangerous" heat wave ...

More than 160 million Americans are under the highest level of extreme heat alerts during a wave of above-average ...

Howard County issues a heat alert due to high temperatures and humidity, advising residents to take precautions.

Millions of Americans face dangerous heat waves this week. Here are essential tips to stay cool and recognize signs of ...

The heat wave caused disruptions to public transport across the Northeast. Amtrak said it will be forced to slow train speeds ...