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➔ Climate change brings extra rain as warmer oceans evaporate more moisture

➔ Water resources will not increase everywhere: in places more rain may not keep pace with strong heat

➔ Longer, hotter summers deplete water resources but melting glaciers can cause short-term surges

➔ Where less or more water is made available to countries already facing chronic water scarcity, losses or gains match heightened marginal water supply costs

➔ Adapting to impacts of climate change on water is feasible in most cases, but in highly arid regions, solutions may prove too costly