Extreme, prolonged heat wave to scorch Southwest U.S. in coming days
- The Southwest United States will experience an intense and prolonged heat wave beginning July 2018.
- Excessive heat warnings are in place for Phoenix, Las Vegas, Death Valley and Southern California deserts until at least July 13.
- Temperatures could reach as high as 120 degrees in some areas, threatening records for high temperatures and hot weather streaks.
- The heat wave's duration is uncertain and depends on the start of the monsoon season, it could last beyond current forecasts.
- The extreme heat will impact over 25 million people across Arizona, California, Nevada and other parts of the Southwest.