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Study Says New Orleans Has Crossed a Sea-Level Tipping Point

The finding elevates calls for a planned, decades-long relocation.

Overview

  • Researchers, in a peer-reviewed paper published Monday in Nature Sustainability, urge officials to start a managed evacuation now to avoid a rushed exodus later.
  • The authors describe coastal Louisiana as the world’s most physically vulnerable coastal zone and say New Orleans could be ringed by Gulf waters before century’s end.
  • The study argues levee upgrades after Hurricane Katrina cannot hold back long-term sea rise, and it adds that the threat would persist even if warming stopped today.
  • The report notes climate-driven out-migration is already visible in a majority-Black city shaped by past decisions that placed many homes below sea level.
  • Local leaders face thin reserves, with about $35 million on hand versus a cited $165 million need, and the mayor has proposed adding roughly $100 million tied to a new Caesars casino contract ahead of the June 1 hurricane season.