Large parts of the Mississippi River system were already in the midst of the longest-lasting flood fight since 1927 before the current severe storm exacerbated the situation . On May 21 , Baton Rouge , Louisiana broke the previous record for its longest-ever flood event , at 136 days . Vicksburg , Mississippi has been in continuous flood stage since February 17 . The Missouri River at Jefferson City reached its highest level since 1995 . The Mississippi River at St. Louis reached a second crest in less than a month , surpassed only by the Great Flood of 1993 . The Morganza Spillway upriver from Baton Rouge , Louisiana , will be opened on June 2 for the third time in its history ; it is opened when river flows at the Red River Landing are predicted to reach 1.5 million cf. The Bonnet Carré Spillway has been opened twice in the same year for the first time since it was built in 1931 . The flood flight was in its 216th day , and is expected to surpass the 1973 record of 225 days
Great Flood of 1993
Great Flood of 1993
Tornado outbreak sequence of May 2019