Another week of blistering heat will bring even more health risks in the coming days, as overnight temperatures won't provide much relief.

A widespread and dangerous heat wave is building across the U.S., with triple-digit highs expected in the Southwest and Great Plains this weekend.

The National Weather Service predicts that more than 90 U.S. local temperature records will be tied or broken through Wednesday.

Some 44 million Americans were under a heat wave warning on Saturday as temperatures in the Rocky Mountains and northern plains of the United States were expected to hit 110F…

WASHINGTON: A widespread and dangerous heat wave was building across the US on Saturday, with triple-digit highs expected in the Southwest and Great Plains this weekend before…

An intense heat wave spread across parts of the western and central United States on Saturday, with triple-digit temperatures forecast from the Intermountain West into the…

From Los Angeles to Boston -- dangerous heat will impact more than 100 million Americans this week.

Another week of blistering heat will bring even more health risks in the coming days, as overnight temperatures won't provide much relief.

More than 90 temperature records could be tied or broken through Wednesday. Most will be overnight heat records, which can be even more dangerous than high daytime temperatures.

Record-breaking temperatures during the day aren’t the only summer danger

Here are some of the cities it will hit the hardest.