The excessive rainfall poses a significant risk of flash flooding, particularly in low-lying areas and near rivers and streams. The NWS has warned that rainfall rates could exceed 2 inches per hour, creating dangerous conditions for residents and travelers. The recent fatalities highlight the life-threatening nature of these floods, which can occur rapidly and with little warning. The affected areas include nearly all of Arizona, western New Mexico, southwestern Colorado, and southern and central Utah. Residents are urged to remain vigilant and prepared for potential evacuations.