The U.S. Supreme Court is set to hear a crucial case that could determine whether climate liability lawsuits by states and municipalities are tried in federal or state courts, affecting thousands of similar cases nationwide against fossil fuel companies.
The U.S. Supreme Court has agreed to hear a pivotal dispute over whether lawsuits by state and local governments aiming to hold fossil fuel companies financially responsible for climate‑related harms must be tried in state courts or shifted into the federal system, according to reporting by Stateline. The case, brought by the city and county of Boulder, Colorado, against Exxon Mobil Corp. and Suncor Energy Inc., could determine the fate of roughly three dozen similar suits seeking billions of dollars to address costs tied to wildfires, floods, sea‑level rise and other climate impacts.
Boulder and allied jurisdictions have argued that state courts are the appropriate forum to enforce consumer protection, fraud and nuisance claims and to make fossil fuel companies answer for campaigns that plaintiffs say misled the public about climate risks. According to Axios, the complaint, originally filed in April 2018, accuses the companies of intentionally downplaying the harms of fossil fuels while profiting from their sale.
Exxon and Suncor contend that the litigation is precluded by federal law and should be resolved in federal courts, pointing to national regulatory frameworks governing greenhouse‑gas emissions. The companies have urged the high court to rule that federal statutes such as the Clean Air Act displace state‑law claims; they also note that federal courts have dismissed related climate cases in the past. AP reports the oil firms argue the national scope of climate policy and regulation makes federal adjudication the proper route.
If the Supreme Court accepts the defendants’ preemption theory, it could substantially reduce the number of climate suits advancing in state venues. Conversely, a decision permitting state‑court proceedings would preserve a pathway for municipalities, counties and states to press claims locally. “We had hoped that the Supreme Court would let the decision of the lower courts rest, but we’re also confident in our case and looking forward for the chance to have it heard,” Boulder Mayor Aaron Brockett said in an interview. “I do think it’s a significant case. If the motion to dismiss is not granted, then we can get into discovery and learn exactly what Exxon and Suncor knew and when they knew it.”
The matter of jurisdiction has repeatedly reached the high court’s periphery. Reuters‑style reporting in The Guardian and Climate Integrity notes that since 2023 the justices have on several occasions declined industry petitions to move climate deception and liability suits into federal court, allowing state proceedings in Minnesota, Honolulu and other jurisdictions to continue. CNBC recalled a 2025 instance in which the Supreme Court refused to take up a Republican‑led challenge aimed at blocking state climate cases, leaving those suits to proceed.
The litigation now comes against a changing federal regulatory backdrop. Stateline’s account highlights that the Trump administration’s repeal of the EPA’s endangerment finding, the scientific determination that supported federal greenhouse‑gas regulation, has injected a new variable into preemption arguments. Industry proponents have previously argued that federal emission rules help insulate companies from state‑law claims; utilities warned regulators that removing federal oversight could open the door to more litigation, the lead report says.
The Supreme Court will also resolve whether the Boulder case is procedurally ready for review. AP reports the court set the case for argument in the autumn term, although the timetable and precise questions to be decided may be refined as briefing proceeds. Observers say the decision could clarify not only forum choice but broader limits on the role of federal statutes in displacing state common‑law and statutory claims.
Numerous jurisdictions across the country have pursued similar litigation. According to reporting by Stateline and Axios, states including California, Connecticut, Massachusetts and New Jersey, alongside cities, counties and tribal governments, have filed suits seeking relief for public costs tied to climate change. The outcome in Boulder is therefore likely to shape the strategy and viability of a large body of pending and prospective claims.
Industry advocates and some state officials have warned that allowing a patchwork of state rulings could fragment national energy policy and complicate regulatory consistency, a position reflected in coverage by AP and The Guardian. Plaintiffs counter that local officials must be able to protect taxpayers and infrastructure from the direct costs of climate impacts when they occur.
As the high court prepares to weigh the matter, the litigation promises to test the contours of federal preemption, state tort and consumer‑protection law, and the judiciary’s role in adjudicating disputes that arise at the intersection of regulatory policy and the global challenge of climate change.
- https://www.omahadailyrecord.com/content/supreme-court-takes-climate-case-testing-local-lawsuits-against-oil-companies – Please view link – unable to able to access data
- https://apnews.com/article/c8982af07855a7a6379e1313ebb71895 – The U.S. Supreme Court has agreed to hear a case brought by oil and gas companies, including Suncor Energy and ExxonMobil, aiming to block climate change lawsuits such as one from Boulder, Colorado. These lawsuits seek to hold the fossil fuel industry accountable for billions in damages tied to the effects of climate change, such as wildfires, rising sea levels, and severe storms. The companies argue that climate issues are national in scope and should be resolved in federal court, where similar cases have been dismissed. In contrast, Boulder and other local governments insist on using state courts to address the local impact of climate change, emphasizing fairness and the financial strain on local taxpayers. This case could set a precedent affecting numerous similar lawsuits across the country. The Supreme Court will also consider whether the case is ready to be heard, with oral arguments expected in the fall. The Trump administration had previously supported the oil companies’ position, warning against allowing local jurisdictions to seek broad climate damages.
- https://www.axios.com/local/boulder/2026/02/23/supreme-court-hear-boulder-climate-lawsuit-exxon-suncor – The U.S. Supreme Court has agreed to hear a significant climate lawsuit brought by the city and county of Boulder, Colorado, along with San Miguel County, against Exxon Mobil and Suncor Energy. Originally filed in April 2018, the plaintiffs are seeking billions of dollars in damages, alleging the companies intentionally misled the public about the environmental impact of fossil fuels. The case is pivotal as it may set a precedent for whether similar climate liability lawsuits will be decided in state courts—which have been more favorable to plaintiffs—or moved to federal courts, where such cases often fail. This is the first climate-related lawsuit of its kind to reach the Supreme Court, and it could significantly influence ongoing legal efforts by other jurisdictions, including local governments in California, Hawai’i, and New Jersey. Boulder officials argue they are facing escalating costs due to climate change and want the companies held accountable at the state level. The outcome could shape the legal landscape for future climate litigation across the U.S.
- https://www.cnbc.com/2025/03/10/supreme-court-nixes-challenge-to-state-climate-suits-against-oil-firms.html – The U.S. Supreme Court has declined to hear a case filed by 19 Republican-led states attempting to block climate change-related lawsuits filed by Democratic-led states against fossil fuel companies. These lawsuits accuse major oil companies of deceiving the public about the role fossil fuels have played in causing climate change. The justices turned away the case, allowing the lawsuits to proceed in state courts. The Republican-led states argued that the lawsuits threaten to fragment national energy policy and could raise energy costs. The decision maintains the ability of Democratic-led states to pursue climate litigation in their own jurisdictions.
- https://www.theguardian.com/us-news/2024/jan/08/minnesota-big-oil-climate-trial-us-supreme-court – Minnesota in 2020 sued the U.S.’s top oil lobbying firm, the American Petroleum Institute, major oil and gas producer ExxonMobil, and Koch Industries, which is tied to the fossil fuel billionaire Charles Koch. The case alleges that the companies engaged in a decades-long campaign to deceive the public about climate change and attempts to force the companies to pay for the effects of the climate crisis on Minnesotans. The defendants have long argued that the case should be heard in federal court rather than the state court where it was originally filed. But on Monday, the high court denied their appeal. The order marks the third time since spring 2023 that the Supreme Court has turned down petitions from the fossil fuel industry to review jurisdiction in lawsuits focused on climate deception.
- https://www.theguardian.com/law/2023/apr/24/supreme-court-oil-climate-lawsuits-state-federal – The U.S. Supreme Court has declined to hear bids by major oil companies to move a growing wave of climate lawsuits from state courts to federal courts. The appeals to move the venue of the lawsuits were made by Exxon Mobil Corp, Suncor Energy Inc, and Chevron Corp. The justices turned away five appeals by the oil companies of lower court decisions that determined that the lawsuits belonged in state court, a venue often seen as more favorable to plaintiffs than federal court. The lawsuits were filed by the state of Rhode Island and municipalities or counties in Maryland, Colorado, California, and Hawaii. Numerous state and local governments have pursued climate-related litigation against oil companies, and the eventual rulings in the cases could help determine whether such lawsuits must be waged in federal courts or at the state level.
- https://climateintegrity.org/news/view/supreme-court-denies-big-oil-request-to-review-climate-lawsuit – The U.S. Supreme Court has denied fossil fuel industry requests to review a Hawai`i Supreme Court decision that allows Honolulu’s historic climate deception lawsuit against Big Oil companies to proceed toward trial. The ruling keeps Honolulu and other communities across the U.S. on track to put Big Oil companies on trial for lying to the public about their role in the climate crisis. This marks the fourth time since 2023 that the justices declined to consider an appeal from Big Oil companies in the growing number of state and local climate deception lawsuits they face. The U.S. Justice Department had urged the justices to deny Big Oil’s request to consider the Honolulu case.
Noah Fact Check Pro
The draft above was created using the information available at the time the story first
emerged. We’ve since applied our fact-checking process to the final narrative, based on the criteria listed
below. The results are intended to help you assess the credibility of the piece and highlight any areas that may
warrant further investigation.
Freshness check
Score:
8
Notes:
The article reports on the U.S. Supreme Court’s decision to hear a climate accountability case involving ExxonMobil and Suncor Energy, dated February 23, 2026. ([bouldercounty.gov](https://bouldercounty.gov/news/u-s-supreme-court-decides-to-hear-climate-case-against-exxonmobil-and-suncor-entities/?utm_source=openai)) Similar reports from reputable sources such as the Associated Press and Axios were published around the same time, indicating freshness. ([apnews.com](https://apnews.com/article/c8982af07855a7a6379e1313ebb71895?utm_source=openai)) However, the narrative closely mirrors these reports, suggesting potential recycling of content. ([apnews.com](https://apnews.com/article/c8982af07855a7a6379e1313ebb71895?utm_source=openai))
Quotes check
Score:
7
Notes:
The article includes direct quotes from Boulder Mayor Aaron Brockett and other officials. ([apnews.com](https://apnews.com/article/c8982af07855a7a6379e1313ebb71895?utm_source=openai)) These quotes appear in the Associated Press report from February 23, 2026, raising concerns about originality. ([apnews.com](https://apnews.com/article/c8982af07855a7a6379e1313ebb71895?utm_source=openai))
Source reliability
Score:
9
Notes:
The article cites reputable sources such as the Associated Press, Axios, and The Guardian, which are known for their journalistic standards. ([apnews.com](https://apnews.com/article/c8982af07855a7a6379e1313ebb71895?utm_source=openai)) However, the heavy reliance on these sources suggests a lack of independent reporting.
Plausibility check
Score:
8
Notes:
The claims about the Supreme Court’s decision to hear the case and the involvement of ExxonMobil and Suncor Energy are plausible and align with recent legal developments. ([bouldercounty.gov](https://bouldercounty.gov/news/u-s-supreme-court-decides-to-hear-climate-case-against-exxonmobil-and-suncor-entities/?utm_source=openai))
Overall assessment
Verdict (FAIL, OPEN, PASS): FAIL
Confidence (LOW, MEDIUM, HIGH): MEDIUM
Summary:
The article closely mirrors content from reputable sources like the Associated Press and Axios, raising concerns about originality and independent reporting. The reliance on secondary sources without substantial independent verification diminishes the article’s credibility. ([apnews.com](https://apnews.com/article/c8982af07855a7a6379e1313ebb71895?utm_source=openai))