Phoenix is starting Sunday near 95°F under clear skies, but the Valley is headed for a much harsher afternoon. The National Weather Service expects temperatures to climb to about 114°F, with an Extreme Heat Warning in effect through Tuesday evening.
Sunday Brings The Worst Of The Heat
Temperatures should pass 100°F before 10 a.m., reach about 109°F around noon and peak near 114°F in the late afternoon. Skies will stay sunny, with mostly light west to southwest winds and occasional afternoon gusts near 20 mph.
Little Relief After Sunset
Sunday night will dip only to around 92°F, and heat-index readings could remain as high as 111°F. Monday is expected to reach 113°F, followed by a high near 110°F Tuesday, while increasing humidity could make Tuesday feel as hot as 117°F in spots.
The warning now runs until 8 p.m. Tuesday, extending the dangerous stretch covered in earlier Hoodline coverage. Even as daytime temperatures ease slightly by Tuesday, warm nights and added moisture will keep conditions uncomfortable and increase the risk of heat-related illness.
Storm Chances Return Later In The Week
Wednesday should be the coolest day of the week, though Phoenix could still reach 108°F. A slight chance of showers and thunderstorms begins Wednesday afternoon and continues intermittently through Saturday, but lower-desert rain remains far from guaranteed.
Any storms that do develop could bring strong wind gusts, blowing dust and brief heavy rain. Forecast rain chances remain around 20% from Wednesday through Friday, with another slight chance Saturday afternoon.
Heat Safety Remains The Priority
Residents should avoid strenuous outdoor activity during the afternoon, drink plenty of water and take frequent breaks in shade or air conditioning. If someone shows signs of heat illness, move them to a cool location; heat stroke is an emergency and requires a 911 call.
Maricopa County residents can call 2-1-1 for information about free cooling centers, transportation, water and other heat-relief services. The safest plan for Sunday is simple: keep outdoor plans brief, move them to early morning or evening when possible, and do not count on nighttime temperatures to provide much relief.
