Flash flood warning issued for Maricopa County as more weather pushes through Valley

The National Weather Service issued a flash flood warning for Maricopa and Gila counties on Sunday morning until 12:15 p.m. as weather continues to push through the Valley.

Authorities also issued a shelter in place warning for Yavapai County until 9:45 a.m. on Tuesday.

It was a wet Halloween night, and it’s expected to continue throughout Sunday, with winds picking up in the afternoon, making for dangerous conditions.

As rain continues throughout the morning, already a half-inch to 1 inch of measurable precipitation has accumulated in the areas where the alerts were issued.

Additionally, the NWS Storm Prediction Center placed portions of south-central and eastern Arizona, including Phoenix and the greater Valley, Tucson and up to Payson, in a marginal risk for severe weather on Sunday, which means the regions included could see wind gusts up to 60 mph, hail up to 1-2 inches in diameter and isolated tornado possibility.

The Storm Prediction Center (@NWSSPC) has placed portions of south-central and eastern AZ in a Marginal Risk for severe weather for tomorrow (Sun, Nov 1, 2026). The biggest severe threat will be in the afternoon with the main hazard being wind gusts of 60 mph. #azwx https://t.co/2Hskt9PKdc

— NWS Phoenix (@NWSPhoenix) November 1, 2026

The severe weather has caused thousands to lose power as well. After more than 5,000 experienced outages, whether a customer of SRP or APS, on Friday, more than 4,000 people were without power as of 7:50 a.m. Sunday, between the two utility companies.

With rain already accumulated throughout the Halloween weekend, more coming on Sunday and winds picking up, city officials are urging people to drive with extreme caution and to continue to check real-time updates.

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