This website is the digital version of the 2014 National Climate Assessment, produced in collaboration with the U.S. Global Change Research Program.

For the official version, please refer to the PDF in the downloads section. The downloadable PDF is the official version of the 2014 National Climate Assessment.

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Welcome to the National Climate Assessment

The National Climate Assessment summarizes the impacts of climate change on the United States, now and in the future.

A team of more than 300 experts guided by a 60-member Federal Advisory Committee produced the report, which was extensively reviewed by the public and experts, including federal agencies and a panel of the National Academy of Sciences.

Explore the effects of climate change
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Site Map

Highlights
Overview
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Report Findings
Our Changing Climate
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Extreme Weather
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Future Climate
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Widespread Impacts
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Human Health
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Infrastructure
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Water Supply
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Agriculture
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Indigenous Peoples
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Ecosystems and Biodiversity
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Oceans
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Responses
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Regions
Northeast
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Southeast
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Midwest
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Great Plains
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Southwest
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Northwest
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Alaska
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Hawai'i
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Rural Communities
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Coasts
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Full Report
Our Changing Climate
Introduction
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Observed Change
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Future Climate Change
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Frost-free Season
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Precipitation Change
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Heavy Downpours Increasing
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Extreme Weather
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Changes in Hurricanes
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Changes in Storms
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Sea Level Rise
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Melting Ice
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Ocean Acidification
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Sectors
Water
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Energy
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Transportation
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Agriculture
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Forests
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Ecosystems
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Human Health
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Energy, Water, and Land
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Urban
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Indigenous Peoples
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Land Use and Land Cover Change
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Rural Communities
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Biogeochemical Cycles
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Regions
Northeast
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Southeast
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Midwest
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Great Plains
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Southwest
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Northwest
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Alaska
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Hawai'i and Pacific Islands
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Oceans
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Coasts
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Response Strategies
Decision Support
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Mitigation
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Adaptation
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Research Needs
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Sustained Assessment
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Appendices
Climate Science Supplement
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FAQs
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The National Climate Assessment summarizes the impacts of climate change on the United States, now and in the future.

A team of more than 300 experts guided by a 60-member Federal Advisory Committee produced the report, which was extensively reviewed by the public and experts, including federal agencies and a panel of the National Academy of Sciences.

United States Global Change Research Program logo United States Global Change Research Program participating agency logos