The purpose of M71 Climate Action Plans is to provide a starting point for utility managers and planners tasked with climate change adaptation planning and developing climate action plans. This manual provides comprehensive global guidance providing the relevant information required to develop a Climate Action Plan (CAP). The manual provides step-by-step guidance to water utility managers to help them define the various concerns associated with the impacts of climate change on management of water supplies and infrastructure. This manual will help water utility managers: Gain a comprehensive understanding of the various threats to a water utility due to climate change Understand the importance of planning for the impacts of climate change for a more resilient water utility Comprehend the components of a CAP and understand why it is essential for management of water supplies and water infrastructure Recognize the steps necessary for preparing a meaningful CAP and keeping it current Identify tools for estimating the cost of a CAP and potential sources of funding M71 includes various case studies and adaptation measures that are helpful to water utility managers who are faced with the challenge of developing a CAP for their utility.