There is now widespread agreement among climate scientists that the earth is warming as a result of human activity, primarily due to rising levels of carbon dioxide and other heat trapping atmospheric gases created by burning fossil fuels. It is also clear that current trends in energy use, development, and population growth will lead to continuing — and more severe — climate change over the course of this century and beyond. Climate change is expected to adversely affect the health of all Americans as well. In fact, many communities across the United States are already experiencing the negative health effects associated with climate change. Fortunately, public health professionals have many opportunities to help the public and other decision-makers better understand the human implications of climate change, and to correct the misperception that climate change primarily harms the non-human world. Americans value good health and the well-being of their community members. We are positioned to explain how the rapidly emerging threats associated with climate change are connected with individual and community health. By communicating the potential of global climate change to harm human health in communities across America, and by conveying the potential to improve human health through actions that limit climate change, we can enhance public understanding of the full scope of the problem, and help enable appropriate responses by individuals and communities.