Thu Sep 18 01:20:00 UTC 2025: **Summary:**
The National Weather Service has issued a flash flood warning for the Tucson area, effective until 7:45 p.m. on September 17th. Heavy rainfall from thunderstorms has already dropped between 0.5 and 1 inch of rain, causing life-threatening flash flooding in creeks, streams, urban areas, highways, streets, and underpasses. Specific areas affected include Tucson, Casas Adobes, Flowing Wells, Catalina Foothills, a section of State Route 77, and several known flash flood-prone locations. Residents are advised to take precautions, including seeking high ground, avoiding floodwaters, and protecting their property.
**News Article:**
**Tucson Under Flash Flood Warning as Heavy Rains Lash Region**
Tucson, AZ – A flash flood warning is in effect for the Tucson area until 7:45 p.m. MST today, September 17th, according to the National Weather Service. Thunderstorms have dumped significant rainfall, between half an inch and an inch, across the region from northwest to central Tucson, triggering immediate and potentially life-threatening flash flooding conditions.
Doppler radar and automated rain gauges confirmed the heavy precipitation, prompting the warning that encompasses creeks, streams, urban areas, highways, streets, and underpasses. Authorities are urging residents in affected areas, including Tucson, Casas Adobes, Flowing Wells, and Catalina Foothills, to take immediate precautions.
The warning specifically includes State Route 77 between mile markers 70 and 73, as well as historically flood-prone locations such as First Avenue north of Fort Lowell Road, Stone Avenue at Mabel Street, and Alamo Wash between Speedway and Grant.
The National Weather Service is urging residents to seek high ground immediately and avoid walking or driving through floodwaters. Officials caution that the depth and velocity of the water can be deceptive, posing a serious risk of injury or death.
“It’s crucial that residents understand the dangers of flash floods,” warned a spokesperson for the National Weather Service. “The ground or road can wash away without warning, and hidden dangers may exist beneath the surface of the water.”
Residents are also advised to protect their property from floodwaters, consider flood insurance, and plan for potential evacuation. After floodwaters recede, structures and utilities should be professionally inspected before re-entry to avoid hazards like structural damage, contaminated water, carbon monoxide poisoning, and electrocution.
For the latest watches and warnings, residents are encouraged to visit the National Weather Service website.
*(This article was compiled using data from the National Weather Service and was edited by a staff member of the Arizona Republic and USA TODAY Network.)*
First Piper 