The heavy rainfall led to widespread flash flooding, particularly in urban areas like Mesa and Phoenix. Roads were inundated, slowing traffic on major routes such as Loop 202. Parking lots and neighborhoods were submerged, creating hazardous conditions for residents. Emergency services, including the Tucson Fire Department, were actively involved in rescue operations, emphasizing the risks posed by swift-moving floodwaters. The combination of lightning and thunder also posed additional safety concerns for outdoor activities.