PHOENIX, Arizona — The Halloween weekend storm that forecasters had been warning metro Phoenix about all week stopped being a forecast on Friday evening, October 30. Between about 5 p.m. and 8 p.m., severe thunderstorms dropped 2 to 3 inches of rain across parts of Paradise Valley and 1 to 2 inches across much of north Scottsdale, turning desert streets into waterways. At about 6:30 p.m., Phoenix Fire Department technical rescue crews were sent to the intersection of 40th Street and Camelback Road, where floodwater had risen nearly to the windows of four stuck cars. Firefighters used a shallow-water entry technique to pull all six occupants out of the four stranded vehicles; fire officials evaluated all six at the scene, and none required hospitalisation, according to KTAR News reporting of the response, which the fire department itself described in a post on X as it unfolded.

Source: KTAR News, via BlazeTrends, Oct 31 2026

The Camelback rescue was not the only one. A second round of Friday storms trapped drivers across the east side of the Valley: firefighters rescued at least two people after vehicles became trapped on flooded streets in east Phoenix, where a sedan and a pickup were stuck near Stanford Drive and 40th Street and more cars were stranded near 32nd Street, Arizona's Family (KPHO) reported. Scottsdale firefighters also helped people from a stalled vehicle near Scottsdale Road and McCormick Parkway. Officials reported no injuries requiring hospitalisation from the rescues, and flash flood warnings remained in effect after some areas had taken more than an inch of rain in less than an hour.

Source: Arizona's Family / KPHO, Oct 30-31 2026

A warning map that lit up, suburb by suburb

The National Weather Service in Phoenix spent Friday evening issuing and extending flash flood warnings across Maricopa County as the cells crossed. At 7:48 p.m. MST, a flash flood warning covered Scottsdale, Paradise Valley and Scottsdale Airport, including Loop 101 between mile markers 36 and 43, running until 10:15 p.m.; law enforcement reported multiple water rescues in the warned area, where 0.75 to 2.25 inches of rain had fallen. At 9:10 p.m., another warning covered Phoenix, Paradise Valley, Piestewa Peak Park, Camelback Mountain and the Arizona State Fairgrounds until 10:45 p.m., carrying what forecasters call a considerable, life-threatening flash flood threat. Warnings were extended until 10 p.m. for Scottsdale, Cave Creek, Carefree and Desert Mountain, and for New River, Cave Creek and Anthem, where stream gauges stayed above alarm stage. The water did not stop at midnight: early on Saturday, October 31, NWS Phoenix kept a flood warning running for Tonto Creek in Gila County until 12:15 p.m. MST, where a gauge north of Tonto Basin had risen above action stage and the Bar X Crossing and other low-water crossings were expected to become impassable — drivers were urged to use the Tonto Creek Bridge instead — and a flood warning for Indian Bend Wash in Scottsdale ran until 5:15 a.m. after 1 to 3 inches of rain.

Source: National Weather Service Phoenix warnings, compiled by Storm Recovery Hub, updated Oct 31 2026

Power out for thousands, and a rough day at Sky Harbor

The storms knocked out electricity across the Valley at the same time. According to KTAR News, more than 5,000 Salt River Project (SRP) and Arizona Public Service (APS) customers were without power as of about 8 p.m. Friday; crews restored service to most of them within about an hour, leaving roughly 1,000 APS customers still in the dark by 9 p.m. Live tracking by PowerOutage.us showed 1,051 homes and businesses out statewide at that stage, 1,046 of them in Maricopa County and 1,039 of them APS customers. In the air, the Federal Aviation Administration issued a ground stop from 11 a.m. to noon on Friday for flights bound for Phoenix Sky Harbor International Airport from surrounding Southwest and Pacific Coast zones, and departure delays averaged up to 75 minutes at their peak; by Friday night, FlightAware had tallied nearly 800 delayed flights and seven cancellations at the airport for the day. Travellers heading through Sky Harbor this weekend should expect the pattern to be possible again: storm delays at desert airports build in bursts, usually in the afternoon and evening.

Source: FAA and FlightAware data via The Contrail, Oct 30-31 2026

Why the desert floods this fast — the background

Phoenix sits in a desert basin where the ground is hard and dry, neighbourhoods are crossed by washes that run empty almost all year, and many streets dip through those washes at low-water crossings instead of bridging them. When a moisture-rich Pacific system — forecasters describe this weekend's pattern as an atmospheric river, a Pineapple Express plume carrying two to three times the normal late-October moisture — parks over the Valley, rain arrives faster than the ground and the storm drains can take it, and a crossing that was dry at lunch can be axle-deep by dinner. That is the whole logic of the National Weather Service's standing warning for exactly these nights: never drive through flooded roads, because most flood deaths happen in vehicles. Friday's rescues followed the pattern precisely — cars that entered water at Camelback, at Stanford Drive and near McCormick Parkway and then had to be abandoned to it. There is also a small historical footnote that underlines how unusual this weekend is: according to Arizona Republic reporting, Phoenix has not had measurable rain on Halloween itself since 1988.

For the Punjabi diaspora in Arizona — the truckers who run Interstate 10, Interstate 17 and Loop 101 through Phoenix and the families settled across Phoenix, Scottsdale, Mesa and Chandler — the practical lessons from Friday night are concrete. The flooded corridors were not remote desert tracks: they were Camelback Road, Loop 101 and the streets feeding Sky Harbor on one of the busiest travel weekends of the autumn, and the second system arrives on the Saturday night when trucks roll early for Monday freight and families are out for Halloween. A low-water crossing or a flooded dip is never worth testing in a car, and it is worth even less in a loaded truck: the six people at Camelback were lucky the water stopped at their windows and the rescuers were minutes away.

By Saturday morning the Valley was drying out and the outage count was falling, but the arithmetic of Friday night is the part worth remembering: three hours of rain, four cars under water at a single intersection, thousands of homes dark, one of the country's busiest airports slowed to a crawl — and a second, longer storm already on the clock for Saturday night.