Extreme heat warning for metro Phoenix extended ahead of potential record-setting highs

As expected, the National Weather Service extended the ongoing extreme heat warning for the Phoenix area a second time.

The Valley has been under an extreme heat warning since Thursday morning. It was originally set to expire Monday. However, with high daytime temperatures persisting, it was extended first to Wednesday night and then to Sunday at 8 p.m.

Hot and humid conditions will continue through mid-week before even hotter (but drier) conditions develop starting Thursday. Extreme Heat Warnings have been extended through Sunday for Phoenix, Yuma, and El Centro, while the rest of the area will be in effect Thu-Sun. #azwx #cawx pic.twitter.com/tFrdxKtvhb

— NWS Phoenix (@NWSPhoenix) July 28, 2026

Alicia Ryan, a meteorologist with the weather service’s Phoenix office, said it is too soon to know if the warning will be extended into early next week.

“After Sunday, it does seem like heat risk does start to drop off to major, and then kind of into the beginning of the workweek to moderate-to-localized major heat risk, but as things progress, we’ll just keep monitoring that and see how that evolves,” Ryan told KTAR News 92.3 FM on Tuesday morning.

After early monsoon activity, Tuesday is on track to be the Valley’s coolest day of the current heat wave.

The storm system pushed the morning low temperature in Phoenix down to 83 degrees, 2 degrees below normal for the date. The Tuesday forecast calls for a high of 106 degrees, which is normal for this time of year.

Thanks to the abundance of cloud cover and showers and storms that moved through the area this morning, the low temperature at Phoenix Sky Harbor Airport was able to fall to 83°, which is 2° below normal for the date. #azwx pic.twitter.com/Rl6ddpWUL9

— NWS Phoenix (@NWSPhoenix) July 28, 2026

But the respite won’t last.

After Tuesday, local daily highs are expected to exceed 110 degrees at least through the weekend and potentially set daily records Friday, Saturday and Sunday.

“In the Phoenix metro, we’re still looking in the upper teens, maybe 116 to 118, with very little relief with overnight temperatures still remaining in the upper 80s to lower 90s,” Ryan said.

How does the extreme heat impact metro Phoenix residents?

Extreme heat warnings trigger daytime closures of hiking trails at Camelback Mountain, Piestewa Peak and South Mountain in Phoenix.

Health experts urge precautions during times of extreme heat, such as keeping hydrated, wearing light clothing and remaining indoors with air conditioning during the hottest times of the day.

The Maricopa County Heat Relief Network offers free, cool spaces and other resources to people who need relief from the heat from May to September.

Additionally, the Salvation Army opens 10 heat relief stations across the Valley during extreme heat warnings.

KTAR News 92.3 FM’s Shira Tanzer contributed to this report.

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