Heat Dome Brings Dangerous Temperatures to Western U.S.
An intense heat dome is currently affecting the western United States, bringing dangerously high temperatures to millions of residents. Approximately 45 million people are under heat alerts, with the most significant impacts being felt in California, Nevada, and Arizona. The heat alerts extend as far north as the Canadian border. Local conditions in Joplin, Missouri, show relatively mild weather with a northeast wind at 3 mph, a heat index of 80°F (27°C), and a UV index of 0, indicating low risk. However, the western heat dome is creating extreme conditions, with temperatures climbing into the triple digits in some areas. Source time: Mon, 03 Aug 2026 13:00:00 GMT.