New paper calls for managed retreat in New Orleans as seas rise

A recent study warns that New Orleans faces severe risks from sea level rise and suggests the city consider relocating inland. The research highlights challenges for Louisiana's seafood industry, which depends on coastal access. Critics argue such proposals overlook local realities and livelihoods.

A paper published in Nature Sustainability this month states that coastal Louisiana has likely crossed a point of no return due to ongoing sea level rise. It projects 3 to 7 meters of additional rise by the end of the century and urges early planning for migration away from the coast. The authors note that New Orleans could resemble Venice, surrounded by water, though still habitable in some form.

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Building on March research revealing sea levels underestimated by nearly a foot in many coastal areas—affecting 80 million people below sea level—a new study maps accelerated land subsidence across 40 major river deltas. Subsidence often exceeds sea level rise tenfold, heightening flood risks for megacities from Shanghai to Jakarta.

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A new analysis reveals that most studies on coastal vulnerability have underestimated current sea levels by an average of 24 to 27 centimetres because they overlooked key oceanographic factors. This methodological blind spot means that flooding and erosion risks will materialize sooner than previously projected, potentially affecting millions more people by 2100. Researchers from Wageningen University highlight the need for better integration of sea-level data in climate impact assessments.

A new national assessment shows that colonization has increased Māori vulnerability to climate-driven floods, storms, and erosion in Aotearoa New Zealand. The report urges greater inclusion of Māori knowledge and authority in adaptation planning.

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Record flooding last month pushed several northern Michigan dams close to failure, with water nearly spilling over a key barrier in one city. The events have renewed calls to address the nation's aging dams amid intensifying storms driven by climate change.

A massive LNG export terminal under construction near Lake Charles, Louisiana, is projected to produce more greenhouse gas emissions than any other in the United States. Owned by Woodside Energy, the facility is expected to release over 9.5 million tons annually once operational in 2029. The project has drawn praise for jobs and investment but criticism for worsening climate risks in a vulnerable state.

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Amid a national retreat from ecological ambitions, emblematic environmental measures are becoming more consensual at the municipal level. In Paris, Les Républicains candidate Rachida Dati includes green proposals in her program for the March 15 and 22, 2026 elections. Yet, some issues remain contentious.

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