Extreme levels of heat and humidity are forecast to spread across the country over the next two weeks, blanketing the Southwest, Midwest, and East Coast with high temperatures beginning this June 19 ...

The temperature on any given summer day may be in the 80s or 90s. So why does it feel so much hotter and oppressive at times? That's the heat index doing its thing. Here's how it works: What is the ...

Across much of the world, hotter days are no longer arriving alone. The air itself is changing, sometimes turning from dry ...

It’s often said that it’s not the heat that gets you; it’s the humidity. We had our first serving of the uncomfortable and ...

The first major heat wave of summer has enveloped much of the midwestern and eastern U.S. in a brutal “dome” of record temperatures and high humidity. The dome phenomenon happens when weather ...

PITTSBURGH — Another surge of summer heat will push temperatures back near 90 on Friday, but humidity levels will not be bad so enjoy some time outdoors. Hot weather sticks around through the weekend ...