Making it Personal: The Role of Wrongful Death Lawsuits in Climate Change Litigation
By Grace McGuire

Climate change litigation involves many players but follows a familiar script. Plaintiffs stake a variety of injuries on rising sea levels, loss of biodiversity, and the increased global temperatures that stem from man-made climate change.[1] Landmark decisions like Massachusetts v. EPA have sharpened claimant’s ability to hold regulatory agencies accountable for setting strict standards on greenhouse gas emissions.[2] States and municipalities have followed suit, asserting state-law claims against individual fossil fuel companies to retrieve funding for climate mitigation and adaptation.[3] More recently, investigative journalism has ushered in a “second wave” of climate litigation.[4] With an arsenal of evidence revealing fossil fuel companies knew of the climate disasters they were creating, plaintiffs may find redress under state statutes that protect against false representation.[5]

A plaintiff in Washington State recently brought a claim for wrongful death using this framework. On May 29, 2025, Leon filed suit in the Superior Court of Washington for King County.[6] She seeks to hold six companies responsible for the death of her mother, Juliana Leon, who died from heat stroke while driving in an unairconditioned car during the 2021 Pacific Northwest heat dome.[7] Leon claims fossil fuel giants ExxonMobil, Chevron, Shell, and others “knew that a growing scientific consensus linked the continued proliferation of their fossil fuel products to ‘severe’ consequences.”[8] According to Leon, the companies’ failure to publicly link their products to global effects like heat domes is the proximate cause of her mother’s death.[9] Leon requests compensatory damages, a jury trial, and the equitable relief of a public education campaign designed to “rectify Defendant’s decades of misinformation.”[10] But, the plaintiff does not ask the court to enjoin defendants from halting or regulating any fossil fuel activities.[11]

Wrongful death suits are rare in climate litigation.[12] This scarcity stems from the significant hurdle plaintiffs face in proving greenhouse-gas emissions caused tangible harm.[13] The merit of wrongful death lawsuits may lie instead in public shock-value and potential to generate state lawmaking. These suits also represent the first wave of climate-based tort law, which may mature into a framework with judicially manageable.[14]

From the Washington Court’s perspective, Leon’s claim presents several barriers. Defendant oil companies will argue that Leon’s complaint falls outside the “zone of interest” or is otherwise too attenuated to proceed.[15] In evaluating standing, the Washington Court might look to neighboring states for support. In 2024, the Montana Supreme Court upheld a finding that plaintiffs’ injuries from inadequate state regulation of greenhouse gas emissions were “fairly traceable” to the results of climate change.[16]  Importantly, the Montana State Constitution provides for a statutory right to a “clean and healthful environment.”[17] The Montana Supreme Court used this constitutional right to find that the plaintiffs had standing.[18] In contrast, Leon’s complaint seeks relief under RCW 4.20.010, Washington’s wrongful death statute.[19] The statute provides for the “economic and noneconomic damages sustained by the beneficiaries . . .[w]hen the death of a person is caused by the wrongful act, neglect, or default of another person . . . .”[20] Accordingly, the Washington Court must decide whether the death of Misti Leon is within the “zone of interest to be protected or regulated” by the wrongful death statute.[21]

Is the failure of fossil fuel companies to disclose the negative effects of their products within the scope of Washington’s wrongful death statute? Unlike the constitutional right to a clean environment in Montana, the wrongful death statute turns on ambiguous terms, such as “wrongful act” and “neglect.”[22] But, the Court may “relax [the standing] requirements when a matter of substantial public importance would otherwise evade review.”[23] The Court may be hesitant to grant standing considering the challenging motions sure to follow.[24]

The next hurdle for Leon’s claim lies in the Washington court’s application of the wrongful death statute. The Washington Supreme Court states that a wrongful death claim must have a “subsisting cause of action” before it accrues upon the decedent’s death.[25] It follows that Leon must prove her mother had a cause of action against the fossil fuel companies during her lifetime. Leon’s complaint provides a litany of deceptive behavior but does not allege that her mother had an ongoing claim against the companies.[26]

Considering this factual deficiency, Leon’s claim may not survive on the merits. So, why bring it in the first place? For one, lawsuits like Leon’s get the nation talking. The death of a mother driving home during an outrageous heat episode asks readers to consider how severe weather pattern shifts may affect our loved ones. Widely broadcasted wrongful death suits encourage state legislatures to consider laws that protect citizens against the effects of climate change. Montana’s state constitution is proof that states can draft laws providing environmental rights to citizens. While wrongful death suits may not fit squarely within state jurisprudence today, it is certain that climate-change tort litigation represents a continuing innovation in climate change jurisprudence.[27] Regardless of what the Washington Court may decide, Leon’s lawsuit has not gone unnoticed.

1 Charleston Sues 24 Fossil Fuel Companies for Costs of Surviving Climate Change, CHARLESTON Sc (Sept. 9, 2020), https://www.charleston-sc.gov/CivicAlerts.aspx?AID=885&ARC=1720.

2 549 U.S. 497 (2007).

3 Katarina Resar Krasulova, The Unlikely Renaissance of Federal Common Law in the Second Wave of Climate Change Litigation, 13 ARIZ. J. ENV’T. L. & POL’Y 72, 75 (2022).

4 Id.

5 Id.

6 Matt Simons, Oil Companies Face First-Ever Wrongful Death Lawsuit Over Climate Change, COURTHOUSE NEWS SERV. (May 29, 2025), https://www.courthousenews.com/oil-companies-face-first-ever-wrongful-death-%20lawsuit-over-climate-change/.

7 Id.

8 Complaint at 1, Leon v. Exxon, No. 25-2-15986-8 (filed May 29, 2025).

9 Id.

10 Id. at 77.

11 Id.

12 Simons, supra note 6.

13 Krasulova, supra note 3, at 121-22.

14 Id.

15 See Wash. State Hous. Fin. Comm‘n v. Nat’l Homebuyers Fund, Inc., 193 Wash.2d 704, 711-12 (2019) (providing the two-part standing test in Washington state).

16 Held v. Montana, 560 P.3d 1235, 1261 (Mont. 2024).

17 MONT. CONST. art. II, § 3.

18 Held, 560 P.3d 1235, 1261.

19 Complaint at 71, Leon v. Exxon, No. 25-2-15986-8 (filed May 29, 2025).

20 WASH. REV. CODE § 4.20.010 (2019).

21 Grant County Fire Protection Dist. No. 5 v. Moses Lake, 145 Wash.2d at 702, 713 (2002) (quoting Save a Valuable Env’t v. City of Bothell, 89 Wash.2d 862, 866, (1978)).

22 WASH. REV. CODE § 4.20.010 (2019).

23 Wash. State Hous. Fin. Comm‘n v. Nat’l Homebuyers Fund, Inc., 193 Wash.2d 704, 712 (2019).

24 See Larson v. Snohomish County, 499 P.3d 957, 970 (Wash. Ct. App. 2021)(finding a 12(b)(6) motion to dismiss for lack of standing is the appropriate procedure when “it appears beyond doubt that the plaintiff can prove no set of facts consistent with the complaint that would entitle him or her to relief”).

25 Deggs v. Asbestos Corp. Ltd., 186 Wash.2d 716, 732 (2016).

26 Complaint at 3, Leon v. Exxon, No. 25-2-15986-8 (filed May 29, 2025).

27 Krasulova, supra note 3 at 121-22.