Hurricane & Storm Damage Risk Reduction System

The Hurricane & Storm Damage Risk Reduction System (HSDRRS) is an integrated flood protection system in southern Louisiana designed to provide the Greater New Orleans area with a 100-year level of risk reduction—meaning protection against a storm surge that has a 1% chance of occurring or being exceeded in any given year. In 2019, the U.S. Army Corps of Engineers warned that accelerated sea level rise and ongoing land subsidence could reduce the system’s designed level of protection by 2023.

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