July 17, 1996 Record flood storms.

The rainstorm on July 17-18, 1996, produced several rainfall records and was the second most costly weather disaster in Illinois behind the 1993 flood. The 16.94 inches recorded at Aurora still stands as the statewide record for the most rain from a single 24-hour period. The 10.99 inches on the west side of the Chicago metro area was the most recorded in the Chicago urban area.