May 17, 2020
A slow moving low pressure area brought a 18-24 hour period of moderate to sometimes heavy rainfall. 3 to 6 inches of rain fell over far eastern WI, which resulted in river, creek, and lowland flooding. Numerous roads were flooded and closed. A small number of water rescues were executed. One indirect death occurred when a retaining wall collapsed onto an elderly woman.
Source: NOAA National Weather Service Storm Events Database (event 883078). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Waukesha County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.