Climate adaptation is the process of adjusting to novel climate regimes, such as reducing water consumption to compensate for reduced precipitation rates, shifting the location of an industry away from an increasingly drought-prone area to a region that will be receiving higher flows, or altering urban stream morphology to allow for larger and more frequent floods. This guide is intended as a primer of some of the basic issues surrounding freshwater from a climate change perspective, as well as a set of policy and resource management recommendations where the issues suggest a position that WWF would anticipate taking on key topics.