Louisiana Coastal Flooding

Currently, Louisiana has 955,000 people at risk of coastal flooding. By 2050, an additional 262,000 people are projected to be at risk due to sea level rise.

Sea level threats down to zip code

Type a coastal place name in Louisiana and find local projections, maps and potential impacts on people, infrastructure, and much more with our interactive tool.

2013 study found that surge and flooding from Katrina was anywhere from 15-60 percent higher than it would have been under the climate and sea level conditions around 1900.

Historic carbon emissions have already locked in enough future sea level rise to submerge most of the homes in each of several hundred American towns and cities, according to Climate Central-led research.

Among the lower 48 coastal states, Louisiana currently has the largest area in the 100-year coastal floodplain, approximately 5,500 square miles. By 2050, this is projected to increase to more than 6,900 square miles due to sea level rise. 

What's Happening with Coastal Flooding?


Rain, Storm Surge Combine to Put U.S. Coasts at Risk

Compound flooding, when heavy rains and storm surge combine, is an increasing risk for U.S. coasts... More


The Fuel Behind Louisiana’s Torrential Rains, Floods

Such heavy downpours are expected to happen more often and be more intense as the world heats up due to the increase of greenhouse gases in the atmosphere... More

New York

As U.S. Coastal Cities Swell, Rising Seas Threaten Millions

A combination of rising populations and rising seas could see millions of Americans living in homes that flood regularly during the decades ahead... More


U.S. Airports Face Increasing Threat From Rising Seas

The threat isn't that sea level rise will gradually breach the defenses surrounding each airport. Instead, at least during the next few decades, scientists say that sea level rise will be more of an enabler of storm-surge flooding, making it easier for even minor storms to produce more damaging surges and flooding... More

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