FEMA Flood Zone Lookup in Arizona

Arizona's flood risk is defined by desert flash flooding, where fast-moving walls of water can develop within minutes of heavy rainfall. The arid climate and sparse vegetation mean the soil absorbs very little water, creating dangerous runoff conditions. The Salt River, Gila River, and Verde River basins are the primary flood-prone corridors in central Arizona. Phoenix sits in a flood-prone valley where even moderate monsoon storms can overwhelm drainage infrastructure. The monsoon season, running from June through September, produces the state's most dangerous flood events. In 2014, a flash flood in Sedona killed a family of six and highlighted the extreme danger of canyon flooding. Arizona's slot canyons, particularly in the Navajo Nation and along the Grand Canyon, are exceptionally dangerous during flash flood events with walls of water up to 40 feet high documented in Antelope Canyon. Tucson and Pima County experience regular flooding along the Rillito and Santa Cruz River corridors. Yuma, located at the confluence of the Colorado and Gila rivers, faces both riverine and agricultural return flow flooding. The state has experienced over $2 billion in flood-related damages since 2000.