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A billboard displays a temperature of 118°F during a record heatwave in Phoenix, Arizona on July 18, 2023.
(Photo: Patrick T. Fallon/AFP via Getty Images)
Woman Files First Climate-Related Wrongful Death Suit Against Fossil Fuel Companies
"These fossil fuel actors should be held accountable to the victims of their lethal conduct, and this wrongful death suit provides a compelling new approach for climate victims moving forward."
May 29, 2025
Two years after legal scholars wrote in the Harvard Environmental Law Review that fossil fuel companies could feasibly be charged with homicide in cases of people who are killed by climate-fueled extreme weather events, one woman is taking a major step toward holding oil and gas giants accountable for a specific death—that of her mother, who died during an extreme heatwave in 2021.
Misti Leon filed a civil lawsuit against Exxon Mobil, Chevron, Shell, BP, ConocoPhillips, Phillips 66, and BP subsidiary Olympic Pipeline Company, arguing that their knowledge going back decades that extracting oil and gas would heat the planet makes them liable for the death of her mother, Juliana.
Juliana Leon, who was 65, was making a 100-mile drive home from a doctor's appointment in Seattle on June 28, 2021 when she pulled over and rolled down her car windows. Emergency workers found her hours later having died of hyperthermia, or overheating, with her body temperature having reached 110°F.
A heat dome had settled over the Pacific Northwest, with high pressure trapping hot air over the region, and the World Weather Attribution later found that the heat dome would have been "virtually impossible" without climate change resulting from fossil fuel emissions.
About 600 more people died in Oregon and Washington in late June 2021 than would have been typical for a one-week period, and Leon is arguing that the death of her mother from hyperthermia, or overheating, was the direct result of fossil fuel companies' actions.
Leon is arguing in the case that, as numerous investigations have found, fossil fuel companies have known for decades that extracting oil and gas would cause planet-heating emissions and could result in extreme, potentially deadly weather events like heatwaves, flooding, and wildfires.
"The purpose of criminal law enforcement is to deter future crimes, promote public safety, punish wrongdoers, and encourage the convicted to pursue less harmful practices. All of these public safety goals apply to Big Oil's continuing contributions to climate change."
"Why shouldn't we hold someone legally accountable for this kind of behavior?" David Arkush, director of Public Citizen's Climate Program and a co-author of the Harvard Environmental Law Review paper, toldThe New York Times. "There would be no question that we would hold them accountable if they caused other types of deaths. This is no different. They foresaw this, they did it anyway, and they hurt people."
Lee Wasserman of the Rockefeller Family Fund called the lawsuit an "important moment for climate accountability."
Although Leon's case is the first, according to legal experts, to attempt to hold fossil fuel giants accountable for a specific death, it is a significant step in a wider effort to bring the industry to justice for its role in causing weather disasters.
Vermont and New York both passed climate superfund laws last year that would allow the states to hold oil companies financially liable for extreme weather events and force them to pay for damages. U.S. Attorney General Pam Bondi has announced lawsuits against the two states over the laws.
In the past decade, dozens of localities and states have also filed lawsuits against oil and gas companies for hiding their knowledge of the impact fossil fuel extraction would have on average global temperatures and the climate.
Aaron Regunberg, accountability project director for Public Citizen's Climate Program, said climate disasters like the one that allegedly killed Juliana Leon "are the foreseeable, and foreseen, consequences of specific actions by fossil fuel corporations, CEOs, and boards of directors."
"They caused the climate crisis and deceived the public about the dangerousness of their products in order to block and delay solutions that could prevent heat deaths like Juliana's," said Regunberg. "These fossil fuel actors should be held accountable to the victims of their lethal conduct, and this wrongful death suit provides a compelling new approach for climate victims moving forward."
"The purpose of criminal law enforcement is to deter future crimes, promote public safety, punish wrongdoers, and encourage the convicted to pursue less harmful practices," he added. "All of these public safety goals apply to Big Oil's continuing contributions to climate change, and prosecutors across the country should take note of this new wrongful death suit and carefully consider how the climate effects their constituents are experiencing fit the criminal laws they are charged with enforcing."
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Two years after legal scholars wrote in the Harvard Environmental Law Review that fossil fuel companies could feasibly be charged with homicide in cases of people who are killed by climate-fueled extreme weather events, one woman is taking a major step toward holding oil and gas giants accountable for a specific death—that of her mother, who died during an extreme heatwave in 2021.
Misti Leon filed a civil lawsuit against Exxon Mobil, Chevron, Shell, BP, ConocoPhillips, Phillips 66, and BP subsidiary Olympic Pipeline Company, arguing that their knowledge going back decades that extracting oil and gas would heat the planet makes them liable for the death of her mother, Juliana.
Juliana Leon, who was 65, was making a 100-mile drive home from a doctor's appointment in Seattle on June 28, 2021 when she pulled over and rolled down her car windows. Emergency workers found her hours later having died of hyperthermia, or overheating, with her body temperature having reached 110°F.
A heat dome had settled over the Pacific Northwest, with high pressure trapping hot air over the region, and the World Weather Attribution later found that the heat dome would have been "virtually impossible" without climate change resulting from fossil fuel emissions.
About 600 more people died in Oregon and Washington in late June 2021 than would have been typical for a one-week period, and Leon is arguing that the death of her mother from hyperthermia, or overheating, was the direct result of fossil fuel companies' actions.
Leon is arguing in the case that, as numerous investigations have found, fossil fuel companies have known for decades that extracting oil and gas would cause planet-heating emissions and could result in extreme, potentially deadly weather events like heatwaves, flooding, and wildfires.
"The purpose of criminal law enforcement is to deter future crimes, promote public safety, punish wrongdoers, and encourage the convicted to pursue less harmful practices. All of these public safety goals apply to Big Oil's continuing contributions to climate change."
"Why shouldn't we hold someone legally accountable for this kind of behavior?" David Arkush, director of Public Citizen's Climate Program and a co-author of the Harvard Environmental Law Review paper, toldThe New York Times. "There would be no question that we would hold them accountable if they caused other types of deaths. This is no different. They foresaw this, they did it anyway, and they hurt people."
Lee Wasserman of the Rockefeller Family Fund called the lawsuit an "important moment for climate accountability."
Although Leon's case is the first, according to legal experts, to attempt to hold fossil fuel giants accountable for a specific death, it is a significant step in a wider effort to bring the industry to justice for its role in causing weather disasters.
Vermont and New York both passed climate superfund laws last year that would allow the states to hold oil companies financially liable for extreme weather events and force them to pay for damages. U.S. Attorney General Pam Bondi has announced lawsuits against the two states over the laws.
In the past decade, dozens of localities and states have also filed lawsuits against oil and gas companies for hiding their knowledge of the impact fossil fuel extraction would have on average global temperatures and the climate.
Aaron Regunberg, accountability project director for Public Citizen's Climate Program, said climate disasters like the one that allegedly killed Juliana Leon "are the foreseeable, and foreseen, consequences of specific actions by fossil fuel corporations, CEOs, and boards of directors."
"They caused the climate crisis and deceived the public about the dangerousness of their products in order to block and delay solutions that could prevent heat deaths like Juliana's," said Regunberg. "These fossil fuel actors should be held accountable to the victims of their lethal conduct, and this wrongful death suit provides a compelling new approach for climate victims moving forward."
"The purpose of criminal law enforcement is to deter future crimes, promote public safety, punish wrongdoers, and encourage the convicted to pursue less harmful practices," he added. "All of these public safety goals apply to Big Oil's continuing contributions to climate change, and prosecutors across the country should take note of this new wrongful death suit and carefully consider how the climate effects their constituents are experiencing fit the criminal laws they are charged with enforcing."
Two years after legal scholars wrote in the Harvard Environmental Law Review that fossil fuel companies could feasibly be charged with homicide in cases of people who are killed by climate-fueled extreme weather events, one woman is taking a major step toward holding oil and gas giants accountable for a specific death—that of her mother, who died during an extreme heatwave in 2021.
Misti Leon filed a civil lawsuit against Exxon Mobil, Chevron, Shell, BP, ConocoPhillips, Phillips 66, and BP subsidiary Olympic Pipeline Company, arguing that their knowledge going back decades that extracting oil and gas would heat the planet makes them liable for the death of her mother, Juliana.
Juliana Leon, who was 65, was making a 100-mile drive home from a doctor's appointment in Seattle on June 28, 2021 when she pulled over and rolled down her car windows. Emergency workers found her hours later having died of hyperthermia, or overheating, with her body temperature having reached 110°F.
A heat dome had settled over the Pacific Northwest, with high pressure trapping hot air over the region, and the World Weather Attribution later found that the heat dome would have been "virtually impossible" without climate change resulting from fossil fuel emissions.
About 600 more people died in Oregon and Washington in late June 2021 than would have been typical for a one-week period, and Leon is arguing that the death of her mother from hyperthermia, or overheating, was the direct result of fossil fuel companies' actions.
Leon is arguing in the case that, as numerous investigations have found, fossil fuel companies have known for decades that extracting oil and gas would cause planet-heating emissions and could result in extreme, potentially deadly weather events like heatwaves, flooding, and wildfires.
"The purpose of criminal law enforcement is to deter future crimes, promote public safety, punish wrongdoers, and encourage the convicted to pursue less harmful practices. All of these public safety goals apply to Big Oil's continuing contributions to climate change."
"Why shouldn't we hold someone legally accountable for this kind of behavior?" David Arkush, director of Public Citizen's Climate Program and a co-author of the Harvard Environmental Law Review paper, toldThe New York Times. "There would be no question that we would hold them accountable if they caused other types of deaths. This is no different. They foresaw this, they did it anyway, and they hurt people."
Lee Wasserman of the Rockefeller Family Fund called the lawsuit an "important moment for climate accountability."
Although Leon's case is the first, according to legal experts, to attempt to hold fossil fuel giants accountable for a specific death, it is a significant step in a wider effort to bring the industry to justice for its role in causing weather disasters.
Vermont and New York both passed climate superfund laws last year that would allow the states to hold oil companies financially liable for extreme weather events and force them to pay for damages. U.S. Attorney General Pam Bondi has announced lawsuits against the two states over the laws.
In the past decade, dozens of localities and states have also filed lawsuits against oil and gas companies for hiding their knowledge of the impact fossil fuel extraction would have on average global temperatures and the climate.
Aaron Regunberg, accountability project director for Public Citizen's Climate Program, said climate disasters like the one that allegedly killed Juliana Leon "are the foreseeable, and foreseen, consequences of specific actions by fossil fuel corporations, CEOs, and boards of directors."
"They caused the climate crisis and deceived the public about the dangerousness of their products in order to block and delay solutions that could prevent heat deaths like Juliana's," said Regunberg. "These fossil fuel actors should be held accountable to the victims of their lethal conduct, and this wrongful death suit provides a compelling new approach for climate victims moving forward."
"The purpose of criminal law enforcement is to deter future crimes, promote public safety, punish wrongdoers, and encourage the convicted to pursue less harmful practices," he added. "All of these public safety goals apply to Big Oil's continuing contributions to climate change, and prosecutors across the country should take note of this new wrongful death suit and carefully consider how the climate effects their constituents are experiencing fit the criminal laws they are charged with enforcing."
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