NEW ORLEANS — A study published in Nature Sustainability identifies coastal Louisiana as ground zero for climate adaptation, citing rising seas, land subsidence, wetland erosion, and stronger storms. The research urges a shift in policy that moves opportunity—not just people—to safer ground through investments in jobs, affordable housing, schools, and industries beyond current voluntary buyout programs.

The study estimates that coastal Louisiana could eventually face three to seven meters of sea-level rise by comparing today’s warming trajectory with the last interglacial period roughly 125,000 years ago. It also projects the loss of as much as three-quarters of the region’s remaining coastal wetlands. Human-caused warming is accelerating sea level rise along Louisiana’s shoreline, creating conflict with existing infrastructure like cities, roads, ports, and levees.

"Social mobility depends on financial mobility— which means adaptation cannot simply tell people to move to safer ground," said Jesse Keenan, a co-author of the paper and professor of sustainable real estate and urban planning at Tulane University. "You catch more flies with honey than vinegar. There is so much economic opportunity to engage with people and to build things. Data centers won’t give people more jobs, but adapting to climate change just might," he said.

The study recommends reviving the canceled Mid-Barataria Sediment Diversion, a $3-billion coastal restoration project, and advancing the Breton diversion on the east bank of the Mississippi River. These river diversions aim to restore sediment flow into wetlands, mimicking natural delta-building processes. "Dredged material can create land, but it does not sustain the same root systems and ecological processes as a living riverine system," Keenan said.

Brianna Castro, a co-author and professor of urban sustainability at Yale University’s School of the Environment, emphasized that outmigration should not be viewed solely as loss. "Outmigration is often framed as tragedy or failure, but in some cases it signals agency," she said. "If you build jobs and you build homes, specifically affordable homes, [on] safer ground, people will come." Castro also noted, "We’re not going to ‘lose’ New Orleans. New Orleans has an incredibly rich local culture, and that will carry across the lake."

Nearly all of Louisiana’s coastal zone has lost residents since 2000. Since Hurricane Katrina in 2005, about a quarter of Orleans Parish’s population has left the area, and more than half of rural Cameron Parish has relocated. The Intergovernmental Panel on Climate Change has identified Louisiana’s coastal zone as the world’s most exposed.