Phoenix Faces Extreme Heat Wave with Temperatures Nearing 107°F
An Extreme Heat Warning has been issued for the Phoenix metropolitan area and surrounding regions in Arizona, with temperatures expected to peak between 105°F and 110°F (40.5°C to 43.3°C) on Tuesday, May 12, 2026. According to the National Weather Service (NWS), this early-season heat wave is particularly dangerous due to unseasonably high temperatures, which are approximately 10°F (5.5°C) above the historical average for mid-May. Nighttime lows in the 70s°F (21°C) will provide limited relief, compounding the risk of heat-related illnesses. The warning covers cities such as Phoenix, Mesa, Chandler, Scottsdale, and Tempe, and is set to expire Tuesday evening. Gradual cooling is expected midweek, but temperatures will remain above average for the rest of the week.