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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Full Report

The full report of the National Climate Assessment provides an in-depth look at climate change impacts on the U.S. It details the multitude of ways climate change is already affecting and will increasingly affect the lives of Americans.

Explore how climate change affects you and your family.

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Our Changing Climate

Global climate is changing. Most of the warming of the past half-century is due to human activities. Some types of extreme weather are increasing, ice is melting on land and sea, and sea level is rising.

Sectors

Explore how climate change affects important sectors such as health, water, and agriculture. Cross cutting sections explore climate change impacts at the intersection of various sectors (such energy, water, and land use), as well as impacts on urban areas, rural communities, Indigenous Peoples, and more.

Regions

Evidence of climate change appears in every region and impacts are visible in every state. Explore how climate is already affecting and will continue to affect your region.

Response strategies

Explore actions to reduce emissions (“mitigation”) and adapt to a changing climate. Many of these actions can also improve public health, the economy, and quality of life.

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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