A powerful heat dome is expected to intensify across large portions of the South this weekend, sending temperatures soaring.

A new heat dome is forecast to build across parts of the western and northern United States this weekend, bringing the potential for all-time temperature records to fall in several cities as ...

July was the hottest month ever recorded in the United States, according to data released Monday by the National Oceanic and ...

In some cities, it is normal for the temperature to shift more than 30 degrees in a single day. In the United States, diurnal temperature variation is highest in arid, high-elevation regions in ...

The U.S. experienced an 88-degree temperature difference in a single day, from 107 in California to 19 in Oregon. A split weather pattern is causing a heat dome in the southern and central U.S. while ...