Sometimes the temperature outside feels warmer than it is, and there's a reason. Here's a breakdown of the heat index.

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

It's because of something called the heat index. The heat index measures what the air temperature combined with the level of humidity feels like to the human body, the National Weather Service says.

Summer is just getting started, and millions of people are under heat advisories as a major heat wave spreads across large ...

According to the CDC, more than 1,000 Americans die due to excessive heat every year. To decrease this statistic, the NWS, ...

An 'extreme heat watch' is in effect as the heat index is expected to skyrocket. Here's timing, updated heat index values, ...

What is the heat index today? Residents can use the NWS Heat Index Calculator to calculate what the heat index is locally. In addition, there is the Heat Index Chart with a wider range of ...

Numerous cities along the East Coast broke or tied heat records as temperatures soared to triple digits on Tuesday.

Two days of stifling heat await New Jersey on Monday and Tuesday with temperatures rising as high as 100 degrees and ...