With a stretch of VERY hot weather ahead for the rest of this month into August, it is a good idea to look at how we measure ...

How is the heat index calculated, and why is it more important than the air temperature during some heat waves?

How low should you set your thermostat for as record-breaking heat sweeps over the country? Here's what experts and other ...

The heat index, or apparent temperature, combines air temperature and humidity to indicate how hot it feels to the body. High humidity slows sweating, the body's natural cooling system, making ...

Almost 100 million Americans were under National Weather Service extreme heat warnings, advisories or watches on July 23 as a heat dome descened on a swath of the nation and slowly spread East.

We can measure the extreme Texas heat in multiple ways, but two new metrics are helping high schools develop a hot weather ...

A heat advisory for Florida's Treasure Coast is in effect from noon through 6 p.m., with heat index values from 109 to 112 ...

More than 97 million people are under life-threatening heat alerts from the South to the East Coast as a large ridge of high ...

Extreme heat is blanketing the Chicago area starting Wednesday, with heat index readings expected to be over 100.The National Weather Service has issued a Heat Advisory, which went into effect for the ...

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