During the hot, humid summer months, meteorologists often discuss the heat index instead of the actual air temperature. But how is the heat index calculated, and why is it more important than the air ...

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 ...

When we talk about climate change, we most often talk about changes in air temperature—and with good reason. The rapid rise in global and U.S. average air temperatures is a direct result of climate ...

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 ...