Aug 12, 2025
Training thunderstorms brought several rounds of torrential rainfall to portions of northeast Illinois on the 12th, especially around the interior Chicago metro area. Street flooding was reported around a number of municipalities. Nearly 500 service requests were made to the city of Chicago for water in basements. One person was also injured at Montrose Beach as lightning struck nearby.
Source: NOAA National Weather Service Storm Events Database (event 1282773). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Cook County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.