The heat index, or apparent temperature, combines air temperature and humidity to indicate how hot it feels to the body. High ...

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

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 ...

All of Florida will be under heat advisories Monday, July 21, as a heat dome spreads from the Ohio and Mississippi valleys.

All of Florida will be under heat advisories Monday, July 21, as a heat dome spreads from the Ohio and Mississippi valleys.

Temperatures in Milwaukee could reach as high as 94 degrees July 23 with a heat index of 105 degrees, and the heat is likely ...

A Heat Advisory is in effect from noon to 9 pm Thursday. Expect heat index values up to 107 with temperatures of 99 to 103.

You may want to make sure your air conditioning is working. Columbus, and a sizable chunk of the nation, is in for a scorcher ...

A heat advisory goes into effect Thursday for parts of Connecticut where heat index values will soar past 100 degrees on ...

Brevard County experienced a heat advisory with a heat index as high as 112 degrees Fahrenheit on July 21. While temperatures ...

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