Flash Flood Warning Hits Tucson Area After Intense Afternoon Storms

TUCSON, AZ (Sept. 17, 2025) - The National Weather Service issued a flash flood warning for the Tucson metropolitan region at 4:30 p.m. on Wednesday, extending through 7:45 p.m. local time, after thunderstorms produced heavy rainfall across Pima County.

Key Details

• Who: Residents and motorists in and around Tucson, including Oro Valley and near Saguaro National Park West
• What: Flash flood warning due to rapid runoff from intense storms
• When: Effective Wednesday, Sept. 17, 4:30 p.m. to 7:45 p.m. MST
• Where: Pima County, AZ

The warning underscores widespread urban flooding and dangerous driving conditions as heavy downpours overwhelmed storm drains and low-water crossings. Local authorities urged travelers to avoid flooded roadways and to “turn around, don’t drown” when encountering standing water.

Storms Trigger Rapid Runoff and Road Closures

By mid-afternoon, Doppler radar detected thunderstorms dumping torrential rain at rates exceeding one inch per hour. Several arterial roads and underpasses near the Rillito River and Santa Cruz wash flooded within minutes, prompting temporary closures and detours.

Emergency crews responded to multiple stranded-vehicle calls, rescues near washed-out roadways, and reports of minor creek overflow near residential neighborhoods. No serious injuries have been reported, but officials warned conditions could deteriorate quickly as additional storms move in from the west.

Safety Measures and Preparedness

• Motorists should avoid nonessential travel until the warning expires.
• Do not attempt to cross flooded roads; seek alternate, higher-elevation routes.
• Stay tuned to local media or official weather apps for updates on flash flood watches or additional warnings.

With climate models indicating a wetter-than-average fall, residents are advised to review flood preparedness plans and maintain awareness of changing weather conditions through the evening.