Flooding poses a significant risk across Arizona, particularly in central areas like Phoenix. The flood watches highlight the potential for dangerous conditions, including road closures and property damage. Heavy rain and thunderstorms may lead to flash flooding, especially in low-lying areas and washes. Residents in flood-prone neighborhoods should be prepared to evacuate if necessary. Additionally, the cooler temperatures may provide temporary relief, but the return to triple-digit heat by the weekend could increase the risk of heat-related illnesses.