The southwestern U.S. is about to feel the wrath of a punishing heat wave that includes a forecast of 120 degrees in Phoenix. According to the Associated Press, that’s a temperature not seen in the desert city in more than 20 years. The broiling temperatures will also be felt in Las Vegas and Southern California, creating a public health hazard. Rising temperatures are being closely watched by everyone from airline pilots and emergency room doctors, to power grid managers and mountain cities unaccustomed to heat waves. The heat is a serious public health hazard in places such as Phoenix and Las Vegas where temperatures routinely exceed 110 degrees in the summer months. The heat wave is expected to peak on Tuesday.
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