Nearly one-fifth of the world’s population lives in a stressed water basin where the next climate change-driven incident could threaten access to an essential resource for agriculture, industry and life itself, according to a paper by University of California, Irvine researchers and others, published today in Nature Sustainability. The study’s authors analyzed trends in global water usage from 1980 to 2016, with a particular focus on so-called inflexible consumption, the curtailment of which would cause significant financial and societal hardship. Those uses include irrigating perennial crops, cooling thermal power plants, storing water in reservoirs, and quenching the thirst of livestock and humans.