Across the United States, climate change is affecting water resources in many ways, including putting water supplies at risk, increasing flooding and erosion, and threatening fish and aquatic species. As global warming pollution continues to affect our environment, these risks to water resources will only increase, posing grave challenges to our nation's cities, towns, and neighborhoods. Some states are leading the way in preparing for waterrelated impacts with integrated and comprehensive preparedness plans that address all relevant water sectors and state agencies. Unfortunately, other states are lagging when it comes to consideration of potential climate change impacts-or have yet to formally address climate change preparedness at all.