Approximately 40% of Louisiana is situated below sea level, primarily in the southeastern region of the state. This includes areas like New Orleans, which is famously known for its low elevation. The elevation in some parts of the state can be as low as 8 feet below sea level.
This unique topography is largely due to Louisiana’s geological history and the natural processes of sedimentation by the Mississippi River. Over time, the accumulation of sediment has created a land surface that is vulnerable to flooding, especially during heavy rains and hurricanes.
Because of its low-lying areas, Louisiana has implemented extensive levee systems and drainage canals to help manage water levels and protect against flooding. However, the risk remains significant, especially with the impacts of climate change and rising sea levels.