Louisiana's disappearing coast

GeoCommunity:

Hurricanes Katrina and Rita transformed some 100 square miles of marsh to open water in southeastern Louisiana. ...

Approximately 39 square miles of marsh around the upper and central portions of Breton Sound were converted to open water by ripping of the marsh or by marsh submergence. ...

An additional 47 square miles of marsh were lost throughout the Pontchartrain, Pearl River, Barataria, and Terrebonne basins. The active Mississippi Delta also incurred approximately 14 square miles of loss. The lower Pearl River basin contains numerous marsh rips south of Highway 90.