The heat index is a measure of how hot it really feels on your body when relative humidity is factored in with the actual air ...

Humidity doesn’t just make you feel sticky and uncomfortable – it also creates extra dangerous conditions on hot days.

A public health researcher explains the signs someone is developing heat exhaustion or heat stroke, and what to do.

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 ...

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

If you are living in one of many areas of the U.S. currently experiencing a heat wave, your outdoor thermometer may say it's ...

At its most basic: the heat index is what the temperature feels like when you're outside. The chart above shows the combination of air temperature with humidity. It's important to note the chart uses ...

If someone is outside and exposed to the direct sun, the actual heat index can be as much as 15 F higher than the heat index chart indicates. A more sophisticated measurement of heat effects on human ...

Heat-related illnesses can quickly progress to life-threatening heat stroke, so it is important to recognize the warning ...

It doesn’t take very high temperatures or very high humidity for the heat index to enter dangerous territory. A heat index chart shows how heat and humidity combine for dangerous conditions.