News Summary
Monsoon storms resulted in significant flash flooding across the Phoenix Valley, causing widespread disruption to transportation and emergency services. Authorities issued life-threatening warnings as rainfall led to vehicle submersion and multiple road closures. The National Weather Service warned of ongoing hazardous conditions, prompting citizens to exercise caution while traveling. Emergency services responded to incidents, including electricity outages affecting thousands of customers. With continued rainfall expected, residents are advised to stay informed and vigilant.
Phoenix
Monsoon storms unleashed significant flash flooding across the Phoenix Valley on September 26, 2025, resulting in widespread disruption to transportation and emergency responses. Heavy rainfall caused multiple roads to flood, prompting authorities to issue life-threatening flash flood warnings throughout the area.
Significant Incidents and Responses
A small SUV was reported submerged in approximately 3 feet of water on a transition ramp from southbound Interstate 17 to westbound Interstate 10 at the Split near Phoenix Sky Harbor. Fortunately, the driver was safely out of the vehicle by the time firefighters arrived on the scene. The transition ramp appeared similar to a wash due to the severe flooding, but water levels eventually receded.
Dozens of vehicle crashes occurred as a result of the rain and flooding conditions, with standing water observed at the intersection of Loop 101 and U.S. 60 in Tempe. Flooded roads were reported at various locations, including:
- 13th Street and Hatcher Street, north of Dunlap Avenue in Phoenix
- Dobson Road and Main Street in Mesa
- Various locations in Sun City, where several cars became stuck in the floods
Weather Conditions and Warnings
The National Weather Service (NWS) warned that flash flood warnings would remain in effect until at least 7 p.m., urging motorists to avoid driving through floodwaters. Rainfall in the area reached a total of 1.64 inches by just before 5 p.m. Additionally, thunderstorms contributed to significant flight delays at Phoenix Sky Harbor International Airport, disrupting travel plans for numerous passengers. The PHX Sky Train service was temporarily suspended between Terminal 3 and the Rental Car Center, with shuttle buses provided for affected travelers.
The NWS also cautioned about frequent cloud-to-ground lightning associated with the storm system, advising residents to seek shelter indoors. Reports indicated large hail, measuring between 1 to 1.5 inches, fell in several locations impacted by the storms. An unusual low-pressure system off the Southern California coast was identified as the source of moisture and instability across Arizona, with some areas recording over 2 inches of rain. Central Phoenix, Glendale, Peoria, Scottsdale, and Tempe were among the locations that saw significant rainfall accumulation.
Emergency Services and Electricity Outages
The Arizona Fire and Medical Authority responded to various emergencies, including at least one report of a person trapped in a wash in Wittmann. By midday, over 16,000 utility customers lost power due to the storms, with varying outages reported from Arizona Public Service and SRP. The storm conditions also prompted the FAA to ground flights to and from Phoenix Sky Harbor, causing major delays and flight diversions.
Ongoing Weather Threats and Future Outlook
The rapidly changing weather conditions have led to ongoing flood watches and warnings, with expectations for continued rain throughout the weekend. Authorities are advising the public to remain vigilant and cautious, as the danger from flooding and severe storms persists.
As the community deals with the aftermath of the storms, officials continue to monitor the situation closely, ensuring necessary precautions are taken to maintain public safety. Residents are encouraged to stay informed and follow advice from meteorological authorities to navigate these hazardous conditions.
Deeper Dive: News & Info About This Topic
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Additional Resources
- AZCentral: Metro Phoenix Weather Blog
- Google Search: Phoenix Weather
- AZFamily: Flooded Freeways and Roads
- Google Scholar: Phoenix Flooding Incidents
- KTAR: Thunderstorms and Flooding
- Encyclopedia Britannica: Monsoon Storms
- ABC15: Waymo Suspends Operations
- Google News: Metro Phoenix Flooding
- Fox 10 Phoenix: Arizona Weather Forecast
Author: STAFF HERE PHOENIX WRITER
The PHOENIX STAFF WRITER represents the experienced team at HEREPhoenix.com, your go-to source for actionable local news and information in Phoenix, Maricopa County, and beyond. Specializing in "news you can use," we cover essential topics like product reviews for personal and business needs, local business directories, politics, real estate trends, neighborhood insights, and state news affecting the area—with deep expertise drawn from years of dedicated reporting and strong community input, including local press releases and business updates. We deliver top reporting on high-value events such as the Waste Management Phoenix Open, Cactus League Spring Training, and Arizona State Fair. Our coverage extends to key organizations like the Greater Phoenix Chamber of Commerce and Visit Phoenix, plus leading businesses in technology and healthcare that power the local economy such as Intel and Banner Health. As part of the broader HERE network, including HERETucson.com, we provide comprehensive, credible insights into Arizona's dynamic landscape.
