Climate change has impaired North American freshwater re- sources and reduced supply security . Reduced snowpack and earlier runoff  have adversely affected aquatic ecosystems and freshwater availability for human uses . Recent severe droughts, floods and harmful algal and pathogen events have caused harm to large populations and key eco- nomic sectors . Heavy exploitation of limited water supplies, especially in the western USA and northern Mexico, and deteriorating freshwater management infrastructure, have heightened the risks . Effective examples of freshwater resource adaptation planning are already underway, but coordinated adapta- tion implementation across multiple conflicting interests and users is complicated and time-consuming . 
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report