TUCSON DEPARTMENT OF TRANSPORTATION AND MOBILITY
PREPARES FOR SUMMER THUNDERSTORM SEASON
OPERATION SPLASH 2025
 Protecting the traveling public on City streets during Tucson’s summer thunderstorm season is the objective of the City of Tucson Department of Transportation and Mobility’s (DTM) Operation Splash campaign. As weather patterns shift to bring moisture into Tucson, crews from DTM’s Streets Maintenance Division will begin to deliver and stage barricades to hundreds of dip crossings throughout the city, beginning Wednesday, June 4, 2025.
During Monsoon, DTM Street Maintenance staff will be on-call 24 hours a day, seven days a week through mid-September. As washes flood, crews will close roadways at dip crossings and washes using the more than 500 barricades that will be placed on the side of the roadways, near the crossings.
For the tenth consecutive year, DTM will assist residents concerned with flooding by offering free self-serve sandbags in the east parking lot of Hi Corbett Field, 700 S. Randolph Way, at Reid Park. DTM staff will monitor the weather forecast as well as the National Weather Service to open the self-serve sandbag program ahead of the first forecasted storm, to ensure the community is prepared. This location will be open 24 hours a day, seven days a week. Sand and sandbags will be provided by DTM staff, and residents should bring their own shovel. To accommodate as many residents as possible with sandbags, there is a limit of 10 sandbags per vehicle. Be sure to follow DTM on social media to be informed about the opening of the self-serve sandbag program. Since the sandbag program began in 2016, DTM has provided approximately 202,000 sandbags to the community.
In the event that severe weather is forecasted in the region, DTM staff will initiate Operation Splash and mobilize to monitor dip crossings and washes. By monitoring radar from the National Weather Service in Tucson and the Pima County Regional Flood Control District ALERT System, staff may also begin barricading dip crossings in anticipation of incoming stormwater.
All low-lying areas in the City of Tucson are subject to flooding during the summer thunderstorm season. The goal of the program is to make sure motorists do not enter flooded roadways. Remember, a barricade in place on a roadway is a sign that unsafe conditions exist ahead. After the floodwater recedes, Streets Maintenance crews begin evaluating conditions of the roadway and remove any accumulation of hazardous debris.
Follow DTM on social media for up-to-date information on the sandbag station going into place as well as road closures that occur during monsoon.
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