Widespread scientific consensus exists that the world’s climate is changing. Some of these changes will likely include more variable weather, heat waves, heavy precipitation events, flooding, droughts, more intense storms, sea level rise, and air pollution. Each of these impacts could negatively affect public health. While climate change is a global issue, the effects of climate change will vary across geographic regions and populations. CDC’s Climate and Health Program is helping state and city health departments prepare for the specific health impacts of climate change that their communities will face.