More than 160 million Americans are under the highest level of extreme heat alerts during a wave of above-average ...

A heat wave is currently affecting about 160 million people, according to the National Weather Service. Here's which states ...

A heat wave hit much of the central U.S. over the weekend, while snow and cool temperatures arrived in the Northwest.

Several states are expecting extreme heat, with the heat index, or feels-like temperature, surging past 100 degrees.