On June 9–10, 1972, extremely heavy rains over the eastern Black Hills of South Dakota produced record floods on Rapid Creek and other streams in the area. Nearly of rain fell in about six hours near Nemo, and more than of rain fell over an area of . According to the Red Cross, the resulting peak floods (which occurred after dark) left 238 people dead and 3,057 people injured. Total property destruction was estimated in excess of $160 million (about $964 million in 2018 dollars), which included 1,335 homes and 5,000 automobiles that were destroyed.