A earthquake on the San Andreas fault could cut off Los Angeles from all three major aqueducts that supply of its water. Water agencies in the San Francisco area have made seismic upgrades to the Hetch Hetchy and Mokelumne aqueducts.
Almost half of humanity will face water scarcity by and strategists in Israel to Central Asia are already bracing for the worst. Meanwhile, half of all freshwater worldwide is being wasted on animal agriculture.
Water balance of Switzerland. The reservoirs, inputs (precipitation, inflows from other countries, virtual water from imports) and outputs (evaporation, discharge to other countries, virtual water from exports) are illustrated. Important areas of water use and consumption are also shown. 10 km3 corresponds to a layer of water 25 cm deep distributed across the whole of Switzerland.