Climate changes will, and already are, affecting every aspect of the hydrologic cycle. Actions are needed to improve our understanding of water-related risks from climate change and to explore and implement strategies to reduce these risks. The Pacific Institute works to quantify climate change’s impacts on water systems and resources, cooperating with diverse stakeholders to identify and develop solutions that promote more resilient water systems in the U.S. and abroad. It is not too late to act to slow the rate of climate change and to reduce the ultimate cost to public health, ecosystems, and the economy. We must reduce the severity of future climate change through efforts to cut or mitigate greenhouse gas emissions from our water systems, and we must adapt to climatic changes we can no longer avoid. The Pacific Institute has published leading reports on climate change, energy, and water; elucidated the connections between climate change, migration, and conflict; investigated the impacts of climate change on agriculture, as well as adaptation strategies; evaluated the effects of climate change-induced sea-level rise on the California coast; and more.