Rebuilding New Orleans: Subsidence and Sea-Level Rise are the Greatest Threats

Share Article

A new article at points to subsidence and sea-level rise as the greatest sustainability threats to rebuilding New Orleans. The city is slipping below sea level at a rate of about one foot per decade. Hurricane Katrina was one of 17 hurricanes to pass near the city since 1852.

News Image

Most people think that hurricanes are the greatest threat to New Orleans, however, a new article at titled Rebuilding New Orleans specifies subsidence and sea-level rise as much greater concerns. Within the next century, New Orleans will sink about one meter and sea level is likely to rise another one to two meters. This places New Orleans an additional two to three meters below sea level by the end of this century.

This continued subsidence and sea-level rise will make the city very expensive to sustain and demand a continuous upgrading of the levees and pumping systems. These costs of protecting the city from seepage and storms will become more expensive than practical. Anyone who owns or plans to purchase New Orleans real estate should understand not only the hurricane risk, but also the subsidence and sea level rise risks.

About serves as a portal to geology and earth science information across the Web. It provides resources for learning about geology and is visited by over 200,000 teachers, students and geologists each month.

For more information, visit


Hobart King


# # #

Share article on social media or email:

View article via:

Pdf Print

Contact Author

Hobart King
Visit website