Tens of millions of people across the Midwest and East braced Sunday for another sweltering day of dangerously hot ...

Maps show where extreme humidity and 90- or 100-degree temperatures will affect about 255 million people across the United ...

A large dome of high pressure is locking in the first heat wave of the summer across much of the central United States. From the Great Plains to the Upper Midwest, heat advisories and even some ...

The phenomenon, described by meteorologists as a ridge of high-pressure air in the upper atmosphere, traps hot air and keeps cooler air at bay.

Much of the East is getting a brief respite from the July-like heat that baked the region earlier this week, but thermometers ...

Tens of millions of people across the Midwest and East endured dangerously hot temperatures again on Sunday as a rare June heat wave that gripped much of the U.S. was expected to last well into this ...

A heat dome — a heat-trapping lid of strong high ... with widespread major risks for heat-related impacts from Oklahoma and Arkansas to Minnesota, Wisconsin and Michigan. Rapid City, South ...

Some parts of Arkansas are about to experience some of the hottest temperatures of the season, and humidity will also produce a brutal stretch of summer heat.

With this heat dome over Arkansas, the chance of a pop-up shower or storm drops significantly, and therefore, maximum heating is expected. Currently, there is so much humidity in the air due to ...

Tens of millions of people across the Midwest and East endured dangerously hot temperatures again Sunday as a sprawling June ...