Jul 25, 2021
Monsoonal thunderstorm activity occurred across Southern California from July 22 to July 29, with a major easterly wave producing widespread convection on July 25 and 26. Numerous reports of heavy rain leading to flash flooding and debris flows were received as well as reports of lightning, hail and dust storm.
Source: NOAA National Weather Service Storm Events Database (event 976675). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Riverside County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.