Local Hazard History
Much of New Orleans sits below sea level, protected by a system of levees, floodwalls, and pumps. In 2005, Hurricane Katrina overwhelmed that system — levee failures flooded roughly 80% of the city, displaced hundreds of thousands, and caused one of the deadliest and costliest disasters in U.S. history. Hurricane Ida (2021) later knocked out power to the entire city for days in dangerous late-summer heat. The metro remains acutely exposed to Gulf hurricanes and the storm surge they push inland.