Monsoon storms cause 15,000 power outages and flight delays in Phoenix metro

Monsoon storms rolled into the Phoenix metro on Monday, unleashing heavy rain and strong winds. The deluge triggered a flash‑flood warning and knocked out electricity for roughly 15,000 Salt River Project customers and 4,500 Arizona Public Service customers. At the same time, Phoenix Sky Harbor Airport saw several flights delayed as runways and taxiways became slick. The combined impact highlights how quickly severe weather can disrupt essential services in the desert Southwest.

What happened

A flash flood warning covering Phoenix, Scottsdale and Paradise Valley was issued until 9:30 p.m., accompanied by a severe thunderstorm warning that ended at 7:15 p.m. and a dust storm warning that lasted until 7:45 p.m. A rain gauge in central Phoenix recorded 1.26 inches of rain in a single hour, prompting rapid runoff and localized flooding.

Power outages affected about 15,000 SRP customers in Maricopa County, roughly 4,500 APS customers, and an additional 10,000 SRP customers in Pinal County. The storm also caused several flight delays at Phoenix Sky Harbor Airport as crews dealt with wet runways and reduced visibility.

Why it matters

Widespread outages strain utility crews and leave residents without heat or refrigeration during extreme heat, increasing health risks. Flight delays ripple through airline schedules, affecting travelers and the regional economy. The event illustrates the vulnerability of desert infrastructure to sudden, intense precipitation events.

How to think about it

Monitor National Weather Service alerts on your phone and have a battery‑powered radio as a backup. Keep an emergency kit with flashlights, batteries, water and non‑perishable food in case power is lost for several hours. If you’re traveling, check airline status updates early and consider alternative airports or ground transportation when severe weather is forecast.

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