This flood might very well exceed the death total of the 1972 flood you brought up. Both occurring at night add to the death total.Being a weather company owner and broadcaster, I won’t camp nor stay near rivers. I’ve seen too many normally 15 feet wide one foot deep turn into raging torrents 150 feet wide and over 10 feet deep. Tidal flooding I worry about almost not at all as it usually takes several days to occur, these things happen in 60 minutes. Read about the Rapid City killer in the 70’s, just incredible like this one
In the Black Hills of Western South Dakota. 15 inches (380 mm) of rain in a small area over the Black Hills caused Rapid Creek and other waterways to overflow. Severe flooding of residential and commercial properties in Rapid City occurred when Canyon Lake Dam became clogged with debris and failed in the late evening hours of June 9 resulting in 238 deaths and 3,057 injuries