The intensifying and expansive heat wave affecting around 150 million people in the United States from Wisconsin to Washington, DC, bears the hallmarks of human-caused global warming.

The heat is no joke and this year, it's impacting a large portion of the U.S. Here's what to know about heat stroke, including how to treat it.

Heat Cramps: This may be the first sign of heat-related illness. It may lead to heat exhaustion or heat stroke. Symptoms: Painful muscle cramps and spasms usually in legs and abdomen. Heavy sweating.

Here's how to safely manage energy levels during peak heat Summer only officially arrived last week, but after the weekend heat wave, some people might already be tired of it. That's probably ...

The first major heat wave of the summer is firing up across the eastern half of the U.S. this week. Michael Nagle On Sunday, the city hit 96 degrees, breaking its old record set in 1910. Now, tens ...

A heat wave is currently affecting about 160 million people, according to the National Weather Service. Here's which states feel the hottest.

Boston — For Arwa Ait-Chaib and her mother, Wafa El Hidar, summertime in Chelsea, Massachusetts, means trying to beat the heat. "There are always some days that I feel like we live in the middle ...

Warning to antidepressant users as heat wave temperatures hit 100 degrees By McKenzie Beard Published June 24, 2025, 10:17 a.m. ET ...

In Washington, D.C., for example, our chief meteorologist Topper Shutt says that we loosely define a heat wave when three or more consecutive days hit 90°F or above. The National Weather Service ...

It's hot, and it's going to stay hot for a while with the heat index above 100 degrees. Is it too hot to walk your dog? How to keep your pets safe.