Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

Alex Fitzpatrick/Axios Most K-12 public students in the biggest U.S. cities, including Miami, attend schools in extreme urban heat zones, a new analysis finds. Why it matters: The heat island effect ...

Extreme heat could negatively impact people's health. "Heat-related illnesses increase significantly during extreme heat and high humidity events," according to the National Weather Service.

An extremely dangerous heat wave is underway for the eastern half of the United States, with Tuesday expected to bring peak ...

A potentially life-threatening heat wave hit the East Coast of the United States on Monday, with temperatures expected to ...

The temperature in New York City has reached 100 degrees as the eastern U.S. sweltered under an extreme heat wave.

US News: A brutal heat wave has gripped the eastern part of the United States as tens of millions of people sweltered in record high temperatures on Tuesday.A .

"This extreme heat will not just be uncomfortable and oppressive for New Yorkers," warned Mayor Eric Adams, adding that each year heat claims the lives of 500 people in this city of eight million ...

Substitutes who watch from the locker room, abandoned practice sessions and sweat-soaked jerseys. A heat wave is taking a ...

Extreme heat warnings are in effect across Arizona and Nevada, raising concerns for children's health. Heat advisories span multiple states, including Texas, with a major heat wave expected from ...