Jul 10, 2018
Scattered thunderstorms moved slowly northwest across southeast Arizona. Heavy rain caused flash flooding in Pima and Pinal Counties and especially in Marana where up to three inches of rain caused widespread flash flooding and considerable damage including a train derailment from rapidly flowing flood waters.
Source: NOAA National Weather Service Storm Events Database (event 773863). 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.