This week kicks off Monsoon Awareness and the biggest issue for drivers are the roads.
The City of Tucson's Department of Transportation kicked off their Operation Splash campaign to prepare roads for potential flooding.
City crews put up more than 500 barricades at nearly 150 dip crossings.
Shawn Moore, TDOT's campaign coordinator, says this helps crews block off a street at a moments notice.
"If you get to an area like this at the Pantano where we have set up barricades and we don't see anything, the chances are in about 20-30 minutes it's going to be flooded," said Moore.
He also says the Tucson Rodeo Grounds will only be open when severe weather is forecasted and city crews will be handing out 10 free sandbags per vehicle.
"If you have water across the road especially if it is moving water, if you can't see the road underneath the water you don't know the conditions of the road is, it's not just the idea whether or not your vehicle can make it across the water you don't know if that road got washed out 20 minutes ahead of time," he explained. "There may or may not be a road underneath that water."
His advice to drivers who encounter running water on the road is to turn around and take another route.