Coolidge has often been criticized for his actions during the Great Mississippi Flood of 1927, the worst natural disaster to hit the Gulf Coast until Hurricane Katrina in 2005.
Coolidge er ofte blevet kritiseret for hans handlinger under Mississippi-oversvømmelsen i 1927, som var den værste naturkatastrofe i Golfkystens historie helt frem til Orkanen Katrina i 2005.