A major heat wave will persist through the end of the week in some areas of the country. Here's what to do while the temperatures remain high.

Workmen plant electricity poles in the rust-orange earth of the Navajo Nation and run cables to Christine Shorty's ...

Difference between extreme heat watch and extreme heat warning Areas where dangerous heat is possible are placed under an extreme heat warning and are asked to prepare in case it happens.

A dangerous heat wave has set in over roughly half of the nation, leaving nearly 150 million people from Texas to Maine under heat alerts on Monday.

Summer will make a dramatic entrance in the U.S. this week with a heat dome that will bring stifling heat and uncomfortable humidity to millions.

NEW YORK — A dangerous heat wave has set in, leaving nearly 150 million people from Texas to Maine under heat alerts on Monday.

The heat wave is expected to subside on Wednesday, but it will take until Thursday for much of the eastern United States to see real relief from the extreme temperatures.

Researchers are increasingly worried about the twin health hazards of extreme heat and pollution, which can amplify each other.

The first big heat wave of 2025 has arrived, coinciding with the official start of summer. More than 40 million people in the U.S. were under heat alerts Friday, according to the National Weather ...