FloodZoneMap.org

Thunderstorms with heavy rain developed to the southwest of the greater Phoenix metropolitan area during the evening hours on September 2nd. Some of the stronger storms generated intense rain with peak rain rates above one inch per hours; the rain was sufficient to generate some flash flooding along Highway 238 between the towns of Mobile and Gila Bend. Although much of the terrain southwest of Phoenix is desert, there are some smaller mountains such as the Maricopa Mountains, and heavy rain ove