Climate Change Indicators in the United States
Climate Change is Happening Now
Twelve new indicators and several years of data have been added to EPA’s indicator suite.
New Interactive Data Viewer
Take a closer look at EPA's indicators with the Climate Indicators Explorer.
A warming climate has brought higher temperatures and thawing permafrost to Alaska and other areas.
Heat Waves in U.S. Cities
Heat waves in most large U.S. cities are occurring more often and the average heat wave season is longer.
About EPA's Indicators
The Earth's climate is changing. Temperatures are rising, snow and rainfall patterns are shifting, and more extreme climate events – like heavy rainstorms and record high temperatures – are already happening. Many of these observed changes are linked to the rising levels of carbon dioxide and other greenhouse gases in our atmosphere, caused by human activities.
EPA partners with more than 50 data contributors from various government agencies, academic institutions, and other organizations to compile a key set of indicators related to the causes and effects of climate change. These indicators also provide important input to the National Climate Assessment and other efforts to understand and track the science and impacts of climate change. Explore the indicators below. Learn more about EPA's indicators.