Scientists warn that three-quarters of the world's drought-prone areas are at risk of extreme water shortages, known as "day zero droughts", this century.
Some of these areas could be hit before 2030, with cities in the U.S., the Mediterranean, and southern Africa being under threat.
An increasing attack on water resources from multiple fronts
A new study reveals that if emissions aren't reduced, almost three-quarters of drought-prone regions will be at risk of extreme water shortages by 2100.
Author's summary: Drought-prone areas face extreme water shortages.