Overview
- The Nature Sustainability paper, published Monday, says coastal Louisiana has passed a point of no return and urges officials to start managed relocation planning.
- It projects the loss of about 75% of remaining wetlands by 2070 and a shoreline shift tens of miles inland, with coauthors warning levees cannot protect a below‑sea‑level city indefinitely.
- Authors cite ongoing climate‑driven depopulation, noting Orleans Parish is down about a quarter since Katrina and rural Cameron Parish has lost more than half of its residents in a lasting “pulse retreat.”
- A separate flood‑risk analysis reported last week that about 99% of New Orleans residents face major flood danger, reinforcing the study’s call to prepare for exit paths and safer housing.
- Policy choices are shaping options, as Governor Jeff Landry canceled the Mid‑Barataria sediment diversion—largely backed by BP spill funds—while researchers say such projects can only buy limited time.