Phoenix is locked under an Extreme Heat Warning through Monday, July 27, with a strong ridge overhead driving daytime highs well into the 110s. Overnight offers only marginal relief, with lows mostly stuck in the upper 80s to low 90s, and heat index values are expected to climb into the low to mid 110s on the hottest afternoons. Residents are urged to push strenuous activity into the early morning or evening hours and keep water and shade close at hand.
What To Expect
Thursday stays sunny with a forecast high near 110°F. The real furnace arrives Friday and Saturday, when highs are projected to reach about 113°F and 115°F, with heat index values potentially climbing into the mid 110s. Light winds are in the forecast, which means very little natural breeze to take the edge off and more time each day for the sun to do its work, according to the National Weather Service.
Heat Relief And Safety
Maricopa County runs a Heat Relief Network of cooling centers, respite locations and hydration stations. Call 2-1-1 to find the nearest open site or arrange transportation. If you have to be outdoors, take frequent breaks in the shade, drink water often, and avoid heavy exertion in the middle of the day when the sun is most intense. Never leave children or pets in parked cars, even for a short time. With overnight temperatures holding in the upper 80s, there is little nighttime relief for anyone without reliable air conditioning. For local maps and resources, see Maricopa County’s Heat Relief Network.
Looking Ahead
Forecasters say monsoon moisture may creep back into the Valley late this weekend into early next week, bringing a slight chance of late day showers and storms. Any storms that do materialize could help nudge temperatures back toward seasonal norms by Monday. Until then, expect persistent and widespread heat impacts across the region and plan your days around the high temperatures.
