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 ...

The heat index was developed in 1979 in order to create a simple chart that people can use to determine when heat gain will ...

Blame the heat index, also called “apparent temperature.” It’s a combination of air temperature and humidity, and it measures what the body actually feels, CNN meteorologist Haley Brink said.

The heat index is a measure of how hot it feels, and it could be 20 to 30 degrees higher than the temperature on the thermometer. Advertisement The heat index is a factor of air temperature and ...

The heat index is a measure of how hot it feels, and it could be 20 to 30 degrees higher than the temperature on the thermometer. The heat index is a factor of air temperature and humidity ...

The heat index, or the "feels-like" temperature, is what it feels like to the body when humidity is combined with the heat. Stream NBC4 newscasts for free right here, right now.

The National Weather Service explains it this way: The heat index is defined as the temperature we will feel if we are outdoors. It is worth noting that these values are if you are in a shaded ...

Blame the heat index, also called “apparent temperature.” It’s a combination of air temperature and humidity, and it measures what the body actually feels, CNN meteorologist Haley Brink said.

Checking the temperature reading during this weekend’s heat wave won’t tell the whole sweltering story. It’s going to feel a lot hotter. Blame the heat index, also called “apparent ...