An extreme heat wave will grip the southwestern United States through early week. A strong ridge of high pressure will take control and strengthen into this 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 the week. “The peak of the heat in many areas will be on Monday, but Tuesday will be no slouch either in the high heat department,” Clark said. READ MORE