In July 2023, a massive heat dome across the American Southwest drove temperatures in Phoenix and Las Vegas to record triple-digit highs. Maxar satellite photos showed how the growth of those ...

High pressure off the Mid-Atlantic Coast and an expanding heat dome in the middle of the country will cover much of the nation east of Rockies and south of the Great Lakes for days.

After a stretch of near-normal July heat, parts of the Desert Southwest could see a slight change in the forecast.