Historic Heatwave in Phoenix, Arizona.
Earliest day that reached 100 ºF (1895-2025) is March 26, 1988.
March 18, 2026 reached 100 ºF.
Earliest 105 or higher day is April 20, 1989.
March 20, 2026 is forecast to be over 105 ºF.
Forecast shows 100 or higher from March 18 to 26, 9 days straight.