Since the 1930s, Louisiana has lost roughly as much land as makes up the state of Delaware.
"If you put the state of Delaware between New Orleans and the ocean, we wouldn't need any levees at all," says John Barry, vice president of the Southeast Louisiana Flood Protection Authority-East. "There is this large buffer of land that has disappeared, and that buffer makes New Orleans much more vulnerable to hurricanes."
Hundreds of thousands of people in southeast China have been evacuated after a powerful typhoon barreled into the region, packing strong winds and heavy rain.
Typhoon Soulik made landfall in China's Fujian province Saturday afternoon after sweeping across Taiwan.
The typhoon comes as China is already battling torrential rainfall across large parts of the country, especially in Sichuan province. Some 200 people have been killed in floods, the worst in some areas of Sichuan in 50 years.