Phoenix is baking under an Extreme Heat Warning on Monday, May 11, 2026, as clear skies give way to dangerously hot conditions across the Valley. The National Weather Service is forecasting a high near 108°F for central Phoenix, with some lower desert spots expected to land between about 105°F and 112°F. The warning is in effect through 8 p.m. MST on Tuesday, May 12, 2026, keeping the dangerous heat locked in for roughly the next 48 hours.
Afternoon Heat And Winds
The most punishing hours will hit from late morning into mid afternoon, with temperatures hovering around 106 to 108°F and afternoon humidity dropping into the single digits. That combination sharply raises the risk of heat illness for anyone working or exercising outside. Winds will stay mostly light today, from the east southeast at 0 to 10 mph, although a southerly push Tuesday could bring gusts in the 25 to 30 mph range across parts of the western Valley. These details come from the National Weather Service office in Phoenix.
Cooling Centers And Safety
Maricopa County and the City of Phoenix have activated the seasonal Heat Relief Network. Residents who need a cool place, water, or transportation assistance can call 2-1-1 for help. If you do not have reliable air conditioning, seek out a public cooling center, spend time in a library or business with AC, and avoid heavy outdoor exertion during peak afternoon hours. Check the City of Phoenix page for cooling center locations and hours.
Through The Week
Temperatures should ease after Tuesday, with highs dropping toward 100 to 102°F on Wednesday, May 13, 2026, and then sliding into the mid to upper 90s by Thursday and Friday. The outlook stays dry, so it is still smart to plan errands for early morning or evening and to check on pets, older neighbors, and anyone who may not have access to cool shelter.
