Aug 10, 2021
Multiple rounds of thunderstorms developed and drifted slowly across southeast Arizona from the early morning hours of August 10 through the late night/early morning hours of August 12. Individual storms produced rain of 1 to 2 inches per hour, but some locations where multiple thunderstorm events occurred received 3 to 5 inches of rain during the period. The result was numerous reports of flash flooding, road closures and swift water rescues, especially in Pima and Cochise counties.
Source: NOAA National Weather Service Storm Events Database (event 981171). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Pima County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.