U.S. Supreme Court Decides to Hear Climate Case Against Exxon and Suncor Entities

Kevin Hannon, Partner at Singleton Schreiber, LLP, was featured by the City of Boulder in an article titled “U.S. Supreme Court Decides to Hear Climate Case Against Exxon and Suncor Entities,” published on February 23, 2026.

Hannon represents Boulder County and the City of Boulder in their climate accountability lawsuit against Exxon Mobil and Suncor entities. The plaintiffs allege that the companies knowingly contributed to climate change and seek to proceed under Colorado state law.

The central legal issue concerns whether federal law preempts state law claims seeking damages for in-state harms. The U.S. Supreme Court will review the Colorado Supreme Court’s ruling that the claims may proceed under state law.