This article has no details on causes. Minnesota has had a dry summer, and the driest September on record. Most streams/rivers in central/south MN are low. https://www.dnr.state.mn.us/river_levels/index.html
Low Water Records for Mississippi River at Lansing
(1) 3.39 ft on 03/13/1938
(2) 4.19 ft on 01/23/1944
(3) 6.09 ft on 11/27/1942
(4) 6.34 ft on 02/04/1943
(5) 6.58 ft on 01/17/1945
(6) 6.76 ft on 08/14/1941
(7) 6.92 ft on 10/28/1940
(8) 6.94 ft on 01/27/1957
Currently at 8ft.
Should that read "is now where", "is not where", or ... ?
The Ohio provides the majority of the water in the lower Mississippi, so it is definitely concerning.