Climate change impacts

Climate changes are underway in the United States and are projected to grow.

Across the country, changes to water resources are of critical concern. In some regions, particularly in the western United States, drought is an important factorconditions are critically affecting local communities. Less snow accumulation in the mountains is important in the West and Alaska where the snowpack stores water for later use. In the Midwest and northeastern states, the amount of heavy downpours has substantially increased over the past few decades. In many regions, floods and water quality problems are likely to be worse because of climate change.

Changes in water stress to U.S. watersheds in the next 50 years due to climate change.
Climate change to increase water stress
Few things are more important to human quality of life than easy access to clean water. Understanding how stressed U.S. watersheds have been…

Our food supply is dependent on climate and weather conditions. Although agricultural practices may be adaptable, changes like increased temperatures, water stress, diseases, and weather extremes create significant challenges for the farmers and ranchers who put the food on our tables.

Human health is vulnerable to climate change. The changing environment is expected to cause more heat stress, an increase in waterborne diseases, poor air quality, extreme weather events, and diseases transmitted by insects and rodents.

Observed trend in temperature from 1900 to 2012; yellow to red indicates warming, while shades of blue indicate cooling. Gray indicates areas for which there are no data. There are substantial regional variations in trends across the planet, though the overall trend is warming.
Does "global warming" mean it's warming everywhere?
Temperature trends across the entire globe aren’t uniform because of the diverse geography on our planet — oceans versus...

Ecosystems are also being affected by the changes that are occurring: habitats are being modified, the timing of events such as flowering and egg laying are shifting, and species are changing their home ranges.

Changes are also occurring to the ocean. The ocean is absorbing about 30% of the carbon dioxide that is being released into the atmosphere from the burning of fossil fuels. As a result the ocean is becoming more acidic. Marine life is being affected by this oceanocean acidification. Along the coasts, higher sea levels causes these areas to be at a greater risk of erosion and storm surges.

Ocean acidification makes it difficult for pteropods to form healthy, strong shells.
Ocean acidity dissolving tiny snails' protective shell
Fifty-three percent of all pteropods sampled in the coastal region using a fine mesh net had severely dissolved shells...


This collection provides the teacher and their students the opportunity to explore some of the environmental changes already observed, from the Arctic to tropical regions. The Climate Literacy Principles developed by NOAA and its partners provides educators with a framework and guide to help direct the instructional use of these lesson plans and other resources. New reports are constantly being released by the multiple federal agencies tasked with studying and responding to climate change. The websites in the background section provide access to the latest scientific information available. In addition to these resources, NOAA offers teachers professional development opportunities (including the Climate Stewards Program) about climate and other topics.

Adapted from materials provided by Global Climate Change Impacts in the United States.