Supreme Court climate ruling could trigger wave of lawsuits, warn energy experts

Key points

• The Supreme Court heard arguments on October 5 in Suncor v. Boulder, which centers on whether federal law prevents cities and states from suing oil companies for climate damage under state law.
• Boulder County and the city of Boulder sued ExxonMobil and Suncor Energy in 2018, alleging the companies misled the public about fossil fuel risks and seeking damages for climate-related harms.
• Energy policy experts warn that a ruling favoring Boulder could open the door to over 90,000 government entities filing similar lawsuits, potentially bankrupting energy firms and raising consumer costs.
• Justices Clarence Thomas and Brett Kavanaugh raised concerns during oral arguments about the potential for widespread litigation against various businesses, including retailers and manufacturers, beyond just oil producers.
• Justice Samuel Alito recused himself from the case, creating a risk of a 4-4 tie that would leave the lower court’s ruling in place without establishing nationwide precedent.

Background

Our earlier coverage from October 5 and 6 noted that the Supreme Court’s oral arguments in Suncor v. Boulder revealed deep uncertainty among the justices regarding the legal basis for preemption. Previous reports highlighted that the case could impact nearly 40 similar lawsuits nationwide and that a ruling was expected in the following summer. The current briefing expands on these developments by detailing specific warnings from energy experts about the financial and market consequences of a ruling for the plaintiffs.

Why it matters

The outcome of Suncor v. Boulder could fundamentally reshape the legal landscape for climate liability in the United States. If the Supreme Court allows state-level lawsuits to proceed, it could trigger a massive wave of litigation from thousands of local and state governments, potentially destabilizing the fossil fuel industry and impacting energy prices for consumers. Conversely, a ruling for the oil companies would establish a federal preemption shield, limiting the ability of local governments to pursue climate damages claims and maintaining the current regulatory framework.

What to watch

The Supreme Court is expected to issue a ruling in Suncor v. Boulder in the coming months, likely by next summer. The decision will determine whether state and local governments can pursue climate damages lawsuits against fossil fuel companies under state law or if such claims are preempted by federal authority. A 4-4 tie would leave the lower court’s ruling in place, potentially allowing similar lawsuits to continue in other jurisdictions without establishing a nationwide precedent.