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 ...

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

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.

We are well into our first heat wave of the season, and it has been brutally hot. The heat index has been a very important ...

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, ...

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

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

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 ...