Plaintiffs argue the case should stay in state court, whereas defendants contend federal court is appropriate because of historical wartime production and regulatory contexts.

The majority held that state courts cannot hear such claims against federal entities or contractors, even with a but-for link to federal contracts.

The ruling preserves the option to pursue the cases in federal court, potentially shaping evidence presentation and strategic direction for environmental litigation in Louisiana.

The decision aligns with expectations that federal courts may be more favorable to corporate defendants in climate-related litigation contexts.

The companies argued federal jurisdiction is appropriate because wartime production and refining activities were conducted under government contracts to support aviation fuel supply, a point the Court affirmed as related to claims against the government and its contractors.

The ruling allows Chevron to appeal the state verdict in federal court, clarifying jurisdiction in disputes involving federal contracts.

Louisiana has suffered extensive coastal land loss, with estimates of over 2,000 square miles lost in a century and projections of up to 3,000 more, with oil and gas infrastructure identified as a major factor.

Justice Samuel Alito recused himself due to financial ties to ConocoPhillips, leaving eight justices to decide the case.

The Supreme Court unanimously ruled that oil and gas companies, including Chevron, can move lawsuits over coastal land loss and environmental damage in Louisiana from state court to federal court, overturning a lower-court decision.

Justice Clarence Thomas wrote the majority opinion, grounding the transfer in the wartime production and aviation fuel refinement context under U.S. government contracts.

Justice Ketanji Brown Jackson concurred in the judgment but disagreed on whether federal provisions separate conduct in a lawsuit from an indirect relationship with a federal contractor.

Louisiana leaders, including Gov. Jeff Landry, backed the lawsuits, while some local attorneys criticized the ruling but plan to continue pursuing the cases.