The Southeast Louisiana Urban Flood Damage Reduction Project (SELA) reduces the risk of flood damages due to rainfall flooding in Orleans, Jefferson and St. Tammany parishes. The improvements generally support the parishes’ master drainage plans and provide flood risk reduction up to a level associated with a 10-year rainfall event. A 10-year event is basically a rain storm that has a 10% annual probability of occurrence and equates to approximately 9 inches of rain over a 24-hour period for our area.