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 ...

Meteorologists say a phenomenon known as a heat dome, a large area of high pressure in the upper atmosphere that traps heat ...

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 ...

Extreme heat watches have been applied to parts of Kansas, Colorado, Louisiana, Mississippi, Indiana, Tennessee, Michigan, Indiana, Vermont, Arkansas ... The heat dome that covers parts of ...