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

With a heat wave causing excessive heat warnings in Delaware, you'll hear a lot about the heat index this week. What to know ...

Monday ended both June and the year’s first half on a day that fulfilled the requirements for summer in Washington: ...

Also, keep your pets cool and indoors. If your pet is exposed to extreme heat, the AKC suggests getting your dog to a shady ...

An Air Quality Advisory is in effect across most of Southeast Michigan through Saturday night, including Livingston, ...

The National Weather Service issued an extreme heat warning for a second day as the heat index surpasses 100. See how hot it ...

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

The weather service issues heat advisories when heat and humidity reach a level that could make people susceptible to heat ...

With a heat wave set to continue for several days, NWS Louisville may extend the heat advisory set to expire June 24 at 8 p.m ...

Weather experts explain the science behind "feels like" temperatures as the region experiences dangerous heat conditions ...

An excessive heat warning is in effect throughout most of Delaware through Wednesday, June 23. The heat index for most of Delaware will hit 100 degrees or higher for much of this week.