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Last Update: 10/26/2026 at 11:33 PM EST
Extreme Event Attribution
Coverage from Eos, The Conversation, and others
Extreme event attribution examines how much human-caused warming influenced a particular weather or climate extreme.
Scientists compare observations and climate-model simulations with counterfactual conditions without human influence, using measures such as changed likelihood, intensity, or rainfall. The field draws on physical understanding, reanalyses, large ensembles, and independent methods to assess confidence. Studies of Hurricane Harvey, Pacific Northwest heat, and other events illustrate both its practical value and its limits: attribution is generally stronger for heat and many heavy-rainfall events than for tornadoes, hail, severe thunderstorms, and other small-scale hazards. Its findings inform preparedness, insurance, policy, and emerging legal and accountability questions.
Looking Back
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History
10/27/2026
A 2026 National Academies assessment now anchors the discussion, elevating shared standards and clearer uncertainty reporting as priorities. Attribution is also being considered in insurance, public health, and litigation, though it does not resolve legal or policy questions.
All Articles47 articles
Important
National Academies report released in the US links long-term extreme-event changes to climate change with higher confidence for heat and cold.
7/16/2026 • Climate Science & Impacts • General
National Academies committee reviews how scientists use data and climate models to attribute extreme events to human-caused warming and quantify confidence limits.
7/24/2026 • Climate Science & Impacts • General
In 2026, Christopher Callahan published an Indiana University study estimating that fossil fuel emissions increased extreme-heat and rainfall risks in the Pacific Northwest and Pakistan.
9/1/2026 • Climate Science & Impacts • General
The National Academies of Sciences, Engineering and Medicine reported that researchers worldwide can increasingly attribute extreme heat and heavy rainfall to human-caused warming, while localized storms remain uncertain.
8/12/2026 • Climate Science & Impacts • General
The National Academies reported in a recent United States assessment that improved attribution methods increasingly identify climate change effects on extreme events while retaining substantial uncertainty.
8/4/2026 • Climate Science & Impacts • General
Researchers describe extreme event attribution methods that quantify human-caused warming impacts on heat, heavy rainfall, tropical cyclones, and droughts, with confidence varying by hazard.
7/25/2026 • Climate Science & Impacts • General
Deepti Singh helped assess National Academies science on extreme event attribution, concluding improved tools and climate models allow event likelihood and intensity assessments used in planning and litigation.
7/20/2026 • Climate Science & Impacts • General
Deepti Singh and a National Academies committee assess advances in extreme event attribution science and summarize impacts on event likelihood and intensity across heat, storms, wildfires, and droughts.
7/20/2026 • Climate Science & Impacts • General
A National Academies report released in 2024 evaluates extreme weather event attribution to human-caused climate change, with uneven confidence across event types and regions.
7/16/2026 • Climate Science & Impacts • General
National Academies issued a report in support of extreme event attribution methods used to quantify human influence on heat waves, droughts, and wildfires in legal and risk contexts.
7/16/2026 • Climate Science & Impacts • General
National Academies report on extreme event attribution released in 2020s says event-specific links to fossil-fuel warming have strengthened while gaps remain for data-poor regions.
7/16/2026 • Climate Science & Impacts • General
National Academies issued an extreme event attribution report describing scientific advances since 2016 and potential legal relevance for cases cited by Multnomah County, Oregon.
7/16/2026 • Climate Science & Impacts • General
In wildfire litigation over the January 2025 Los Angeles fires, forensic meteorologists reconstruct Santa Ana wind, humidity, and pressure conditions while climate analysis compares multi-decade baselines for drought and temperature trends.
7/14/2026 • Climate Science & Impacts • General
Attribution science uses climate-model counterfactuals to quantify how human-caused warming increased risks during events such as the 2021 Pacific Northwest heatwave.
7/8/2026 • Climate Science & Impacts • General
Carbon Brief summarized extreme-event attribution research linking climate change to UK heat extremes, European and North American wildfires, and late-June West African flood rainfall.
7/22/2026 • Climate Science & Impacts • General
A US National Academies report says climate event attribution has matured, while uncertainty remains for smaller-scale hazards and some regions.
7/17/2026 • Climate Science & Impacts • General
Roger Pielke Jr. argues that World Weather Attribution uses assumptions that can overstate climate change links to extreme events in Nepal, the Netherlands, and Japan.
9/17/2026 • Climate Science & Impacts • General
Christopher Callahan published a 2026 attribution study showing fossil-fuel emissions increased the likelihood of major heat and rainfall events globally, with potential relevance to climate-liability cases.
8/31/2026 • Climate Science & Impacts • General
Christopher Callahan's source-attribution research quantified fossil fuel companies' contributions to extreme heat and rainfall, potentially strengthening climate-liability lawsuits in the United States.
8/24/2026 • Climate Science & Impacts • General
In 2026, Roger Pielke Jr. criticized the National Academies report for broad event-attribution language during a discussion involving Jim Hurrell of Colorado State University.
8/21/2026 • Climate Science & Impacts • General
National Academies assessment recommends shared standards and improved models for rapid climate attribution of compound extreme events.
7/16/2026 • Climate Science & Impacts • General
World Weather Attribution links a US eastern heat wave to fossil-fuel greenhouse gases as insurers and policymakers increasingly use attribution despite political credibility disputes.
7/10/2026 • Climate Science & Impacts • General
The National Academies of Sciences, Engineering, and Medicine released an extreme event attribution report on July 16, 2026, in the United States, recommending stronger methods and clearer uncertainty communication.
7/16/2026 • Climate Science & Impacts • General
Sabin Center reported the Climate Attribution Database expansion and highlighted litigation in Oregon and New York using climate attribution science for heat dome and emissions liability.
5/19/2026 • Climate Science & Impacts • General
Researchers use attribution science to measure how human-caused warming altered extreme weather risks in events including the 2021 western North American heat wave and 2023 Quebec fires.
9/15/2026 • Climate Science & Impacts • General
In a new United States report, the National Academies finds climate attribution science must increasingly assess overlapping and cascading extreme events to support adaptation.
8/20/2026 • Climate Science & Impacts • General
National Academies released a 252-page report in the USA assessing increased strength in extreme weather attribution research and its potential litigation use.
7/16/2026 • Climate Science & Impacts • General
Friederike Otto and World Weather Attribution released rapid extreme weather attribution results within weeks after major events by comparing present climate to a cooler-world baseline.
3/24/2026 • Climate Science & Impacts • General
Carbon Brief published a climate science and policy roundup in which multiple studies quantify how climate change alters extreme weather likelihood or intensity across different regions.
7/21/2026 • Climate Science & Impacts • General
Andrew Dessler explains 2020s-era extreme event attribution methods, quantifying how human warming changes likelihood and intensity of heatwaves and other extremes.
7/6/2026 • Climate Science & Impacts • General
Climate risk research draft outlines extreme event attribution methods that use counterfactual simulations and observations to quantify human contributions to heat and rainfall extremes.
6/30/2026 • Climate Science & Impacts • General
National Academy of Sciences report published in a context of attribution debates links human-caused warming to hurricanes, heat waves, and extreme rainfall using improved methods.
7/16/2026 • Climate Science & Impacts • General
WHO deliberations on PHEIC designations are proposed to incorporate climate-attribution evidence when climate change influences outbreak risk, severity, or transmission.
7/24/2026 • Policy, Politics & Governance • General
Researchers have used event attribution methods since the 1990s to estimate how human-caused climate change affects extreme weather worldwide, including heavier rainfall during Hurricane Harvey in Texas in 2017.
10/19/2026 • Climate Science & Impacts • General
University of Washington researchers Dargan Frierson and Lauren Henrie reported in a PLOS Climate study that simulations through 2500 show past emissions from 178 carbon majors sustaining warming and disaster risks globally.
9/24/2026 • Climate Science & Impacts • General
Roger Pielke Jr. introduced a U.S. extreme-weather dashboard that analyzes 32 variables against internal variability and IPCC attribution findings.
7/29/2026 • Climate Science & Impacts • General
Jim Hurrell chaired a National Academies committee reporting decade-scale advances in extreme event attribution science for heatwaves, floods, and hurricanes.
7/24/2026 • Climate Science & Impacts • General
As You Sow highlighted a National Academies report on extreme weather attribution, describing potential insurer pricing and court responsibility impacts in the United States.
7/21/2026 • Climate Science & Impacts • General
National Academy of Sciences released a climate attribution synthesis on extreme event likelihood and event impact harms, amid debates over climate accountability and EPA regulation.
7/16/2026 • Climate Science & Impacts • General
Dr. Sarah Kapnick discusses climate science advances over the last 10-15 years and their implications for risk, policy, and finance in an interview.
2/6/2026 • Climate Science & Impacts • General
In a 2020s American Enterprise Institute commentary, a climate researcher outlines IPCC definitions and probability concepts to explain challenges in detecting and attributing changes in extreme weather.
7/2/2024 • Climate Science & Impacts • General
Roger Pielke Jr. criticized World Weather Attribution's extreme-weather methods in a post focused on Nepal flooding and a temperature example from De Bilt, Netherlands.
9/18/2026 • Climate Science & Impacts • General
Roger Pielke Jr. used AI tools in the past year to develop climate dashboards and data products globally, reducing estimated direct costs below $10,000 while retaining expert validation.
9/6/2026 • Climate Science & Impacts • General
Roger Pielke Jr. launched a global dashboard applying the IPCC detection framework to eight extreme-weather phenomena across every continent.
8/19/2026 • Climate Science & Impacts • General
Interesting
National Academies scientists released a report in 2026 describing how climate change intensifies extreme weather as the United States, Europe, and Canada face record heat and wildfire smoke.
7/18/2026 • Climate Science & Impacts • General
IPCC AR6 assessments (2023) show human influence increasing extreme weather risk globally.
12/13/2018 • Climate Science & Impacts • General
The Sabin Center for Climate Change Law and Columbia Climate School will host the second attribution science and climate law conference on June 10-11, 2026, in New York City.
6/10/2026 • Policy, Politics & Governance • General