Phoenix Bakes at 113 as Weekend Monsoon Storm Threat Builds

Phoenix is waking up to another dangerous heat stretch Thursday, with partly cloudy skies, a temperature near 97 degrees early in the morning and an afternoon high near 113. The heat will be relentless through Saturday before a wetter, stormier pattern takes over the Valley this weekend.

Extreme Heat Warning Runs Through Saturday

The National Weather Service has an Extreme Heat Warning in effect for the Phoenix metropolitan area until 8 p.m. Saturday, August 29. Afternoon temperatures are expected to reach 107 to 114 degrees, with major to extreme heat risk and little overnight relief as lows remain near 90 degrees.

Thursday will be mostly sunny after some early clouds, with light winds generally around 5 mph and the mercury climbing steadily through the afternoon. A slight chance of showers or thunderstorms arrives late Thursday night, mainly between midnight and 3 a.m., but rainfall chances remain low and any amounts should be minor.

Storm Chances Build This Weekend

Friday will stay mostly sunny and nearly as hot, with a high near 112 degrees. The chance of overnight showers and thunderstorms increases to 40% Friday night, followed by a 30% chance of storms after 5 p.m. Saturday as temperatures ease to about 109 degrees.

Sunday brings the biggest shift in the forecast, with a 60% chance of showers and thunderstorms and a high near 104 degrees. Storms could continue Sunday night, and Monday remains unsettled with a 40% chance of afternoon thunderstorms and a high near 102 before sunnier, drier weather returns Tuesday.

Heat Safety Remains Critical

Residents should avoid strenuous outdoor activity during the hottest part of the day, drink water frequently and take breaks in air-conditioned or shaded spaces. Maricopa County says residents can call 2-1-1 for free cooling centers, water, transportation and other heat-relief resources.

Anyone showing signs of heat exhaustion should be moved to a cool location and given help immediately. Confusion, loss of consciousness or very hot skin can signal heat stroke, which is an emergency requiring a call to 911.