Aug 20, 2023
Tropical Storm Hilary made landfall across northern Baja California on August 20, and moved through Southern California that afternoon and evening. Torrential rainfall occurred across mountain and desert communities, resulting in catastrophic flash flooding and debris flows, damaged railways and bridges, and the closing of major interstates including I-8 in San Diego County and I-10 in Riverside County. Widespread tropical-storm force winds were recorded across much of Southern California.
Source: NOAA National Weather Service Storm Events Database (event 1129872). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Orange County Inland County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.