Summer is here, and heat and humidity have arrived.

Temperatures are skyrocketing for the third straight day across the Eastern US, but there’s at least three different ways to ...

That is because the dew point is a measure of how much water vapor is in the air and relative humidity is a measure of how much water vapor is in the air relative to how much water vapor could be in ...

Much of the U.S. is under a blanket of oppressive heat as people prepare for a sweltering July 4th holiday. It’s during times like these that you often hear people talk about the “heat index” when ...

Thursday was the peak of this brutal heat wave, with heat index values topping 110 degrees in several Connecticut towns.

Today's heat index value in Ocala could approach 106 degrees, the National Weather Service reports. The story is similar ...

What to know about the situation from the National Weather Service.

Jacksonville and west-central Illinois face an extreme heat warning as heat index values reach 105 to 110 through Thursday.

The metric of how hot the air actually feels has roots in a 1979 journal paper called “The Assessment of Sultriness.” By Andy Newman In recent days, you may have seen or heard many mentions of a ...

Kentucky Mesonet – the Commonwealth’s official weather and climate monitoring network whose offices are based at Western ...

Indoor pools can have a distinct odor caused by chlorine binding to body waste. A Minnesota student invented a device to measure chloramine levels.