Blending Integrated Water Resources Management (IWRM) and Climate Change Adaptation (CCA) is one key vehicle to facilitate taking real action to reduce climate impacts on water and avoid the worst of potential consequences for human health, economic growth, and even international relations. This report thus discusses how IWRM can and is serving as an adaptation solution to reduce vulnerability to climate change, and, conversely, how CCA processes such as National Adaptation Plans (NAPs) and Nationally Determined Contributions (NDCs) can accelerate, and already are accelerating, IWRM implementation.