Iowa Joins States Shielding Big Oil From Climate Lawsuits as Legal Battles Heat Up

Iowa has become one of several states signing laws to protect oil companies from climate-related lawsuits, even as novel legal cases across the country push the fossil fuel industry into what one advocacy group calls 'panic mode.'

The moves come as a Washington state judge allowed a wrongful death lawsuit against Exxon Mobil, BP, Chevron, and Shell to proceed. The case, filed by Misti Leon after her mother died during a record 108-degree heat wave in June 2021, argues the companies knew their emissions would cause deadly heat but deceived the public. An estimated 1,200 people died in that heat dome.

Iowa, Utah, Tennessee, Oklahoma, and Louisiana have recently enacted liability shield laws protecting fossil fuel companies from lawsuits over greenhouse gas emissions. Montana and Utah also reformed nuisance laws to block similar claims.

Why Iowa's Liability Shield Matters for Local Taxpayers

Iowa's law prevents cities and counties from suing oil companies for climate damages, a move supporters say protects jobs and energy independence. Critics argue it shields corporations from accountability while taxpayers foot the bill for extreme weather costs, including flooding and drought that impact Iowa's agriculture.

'If these companies have done nothing wrong and they think the law is on their side, why are they lobbying Congress for immunity?' asked Mike Meno of the Center for Climate Integrity, which supports climate accountability cases.

Republican-Led Effort Goes National

Republicans in both chambers of Congress introduced bills this spring granting broad immunity to oil companies, backed by the American Petroleum Institute. The industry's lobbying arm made 'stopping extreme climate liability policy' a top priority for 2026.

President Donald Trump also entered the fray, issuing an executive order directing the Justice Department to block state climate lawsuits. In May, the DOJ sued Minnesota over its climate case, arguing it undermines 'American energy dominance.' Robert Levy, a longtime Exxon lawyer, recently joined the Justice Department's new Energy and Natural Resources Division.

Attribution Science Under Fire

The oil industry is challenging 'attribution science,' a field linking specific emissions to extreme weather events. A major report from the National Academies of Sciences found the science linking climate change to extreme heat, cold, and heavy rainfall is increasingly robust.

Republican attorneys general pressured the National Academies and the Federal Judicial Center to remove a climate science chapter from a judges' reference manual. Only the Judicial Center complied. Trump ordered a review of the National Academies, calling climate science 'fraud.'

What This Means for Iowa

For Iowans, the legal battles could shape how the state handles future extreme weather costs. Iowa's agriculture sector is vulnerable to drought and flooding, which scientists link to climate change. The state's liability shield prevents local governments from seeking damages from oil companies, potentially leaving taxpayers to cover infrastructure upgrades.

Supporters of the shield say it protects Iowa's energy sector and prevents activist lawsuits. Critics argue it undermines accountability and shifts costs to families.

Frequently Asked Questions

What is Iowa's liability shield law?

Iowa's law prohibits lawsuits against fossil fuel companies for damages related to greenhouse gas emissions. It was signed by Governor Kim Reynolds and supported by Republican lawmakers.

How many climate lawsuits are pending nationwide?

Nearly 40 climate lawsuits are pending across the U.S., according to Columbia Law School's Sabin Center. At least five have reached the discovery stage, including cases from Massachusetts, Vermont, Connecticut, the District of Columbia, and Honolulu.

Could the Supreme Court affect these cases?

Yes. The Supreme Court is expected to hear a case from Boulder, Colorado, this fall. The city alleges Exxon and Suncor violated state laws by concealing product dangers. The outcome could reshape legal strategies for climate lawsuits.

Why does Big Oil fear these lawsuits?

Industry lawyers acknowledge they must win every case to avoid the fate of Big Tobacco, which paid hundreds of billions in settlements. 'I have to win every time,' Exxon lawyer Justin Anderson said. 'They just need to find one they can get through.'