Extreme heat will persist for several days across the southwestern United States starting this weekend. A strong ridge of high pressure will take control and strengthen into next week, sending temperatures to dangerous levels. “When a ridge of high pressure like this one forms in the middle to late June,

it can deliver some of the hottest weather possible to the Desert Southwest,” AccuWeather Western U.S. Expert Ken Clark said. Temperatures will run between 10 and 20 degrees Fahrenheit above average through the early part of next week. READ MORE