Just in time for summer, here comes the heat. "A dangerous, widespread heat wave will bake the central and eastern U.S., bringing the hottest temperatures of the year and uncomfortably muggy air to ...

Forecasters predict the worst of a record-setting heat wave may soon be over — but millions still need to take precautions to stay safe from dangerous heat. The most significant heat conditions are ...

OK. One of the times I went running this week in our nation's capital, it was early in the morning but already 82 degrees and 82% humidity. Washington, D.C., has had daytime temperatures over 100 this ...

The prolonged, dangerous heat wave is expected to begin broiling much of Southern California on Wednesday, peaking Thursday, Friday and Saturday. A red flag warning has been issued for Los Angeles and ...

Many places around the country will experience their first significant heat of the year in the next few days. Here’s why it’s so dangerous. See detailed maps about the latest heat index forecasts.

Extreme heat is a killer and its impact is becoming far, far deadlier as the human-caused climate crisis supercharges temperatures, according to a new study, which estimates global warming tripled the ...

A major heat wave is set to crank temperatures up across inland Southern California this week, with some areas bracing for triple-digit highs that officials warn will bring health concerns and elevate ...

A "heat dome," similar to a heat wave, is a high-pressure system trapping hot air and causing prolonged high temperatures. Heat domes differ from heat waves in their duration and the stagnant nature ...

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A marine heat wave in the Mediterranean Sea is combining with a powerful heat dome to cause Europe to swelter under a brutal early summer heat wave. It’s a pattern that’s popping up frequently as the ...