Extreme heat warning issued for Tuesday-Thursday in metro Phoenix

With dangerously high temperatures in the metro Phoenix forecast this week, the National Weather Service issued an extreme heat warning.

The warning is set to run from 10 a.m. Tuesday to 8 p.m. Thursday.

Highs are expected to reach about 108 degrees during that time, about 5 degrees above normal for this time of year.

Well above normal temperatures with highs near 110°F and lows well into the 80s are expected over the next few days. Extreme Heat Warnings go into effect today and on Wednesday for the lower deserts and last through at least Thursday. #azwx #cawx pic.twitter.com/gEQMwKjWNM

— NWS Phoenix (@NWSPhoenix) September 8, 2026

Thursday will be the Valley’s 47th day under an extreme heat warning in 2026, one shy of the record of 48 from 2020.

Is there any rain in the Phoenix forecast?

The Phoenix area could see the return of monsoon thunderstorms later in the week and over the weekend as temperatures return to the normal range.

There’s at least a slight chance for rain in the forecast from Thursday night through Monday.

The best chance is Friday, which has a 40% probability.

What happens during an extreme heat warning?

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

The Maricopa County Public Health Department has confirmed 136 heat-related deaths so far this year, about double the number at this time in 2025.

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.

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