In a unanimous decision, the Supreme Court opened the door for Chevron and Exxon Mobil to relocate state‑court claims over coastal erosion to federal venues. The ruling shifts a high‑stakes battle over Louisiana’s 2,000‑square‑mile coastline.

The case, Chevron USA Inc. v. Plaquemines Parish, hinged on whether wartime federal contracts tied to aviation gasoline qualified for removal under the federal officer statute. Justice Clarence Thomas affirmed that the companies’ World War II activities fall within that scope.

Louisiana’s $50 billion master plan to rebuild marshes faces new hurdles as parishes seek billions in damages. The decision tips the balance toward oil companies, potentially stalling state‑led litigation and tightening the legal environment for climate‑related claims.

The outcome signals a broader shift in how environmental disputes involving legacy energy projects will be contested, favoring corporate interests over state‑level accountability.