The flooding has disrupted transportation across Pima County, with numerous roads closed due to high water levels. Motorists attempting to cross flooded areas risk becoming stranded, as demonstrated by the 16 river rescues conducted on Sunday. Falling boulders near Windy Point also pose a hazard to drivers on Catalina Highway. Fast-moving water in creeks and washes has created dangerous conditions for hikers, as seen in Bear Canyon. The National Weather Service warns that even shallow water can sweep vehicles away, emphasizing the importance of avoiding flooded roads.