What is heat index and how does it affect how stifling excessive heat feels?

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 ...

Whether a summer day is great or awful often comes down to the humidity.

The monsoon may bring rain, but rising humidity, warmer nights and urban heat are making Indian cities feel hotter than the ...

Most people know that air conditioners dehumidify the air while they make it colder, but are they able to outclass ...

This summer, temperatures and humidity have broken records. Here's what research has shown about how our sleep is affected.

New York state has entered its first heat wave of the summer - with highs expected to soar into the upper 90s and even past ...

At 10:52 a.m. on Monday, the NWS Spokane WA issued a red flag warning valid for Wednesday between 11 a.m. and 10 p.m. for ...

A nine-year-old from Kennewick has just set a new kid's world record for holding the longest plank.

At 10:53 a.m. on Monday, the NWS Pendleton OR issued a red flag warning valid for Tuesday between 1 p.m. and 10 p.m. for ...

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 ...

Today's extreme heat for the World Cup match between Portugal and Croatia is expected exceed world soccer union guidelines ...