Drought, mismanagement of water resources, coupled with US sanction, led to protests, starting in the southwestern province of Khuzestan in July, later in Isfahan, and, soon afterwards, in its neighboring province of Charmahal and Bakhtiari.

The Saudi blockade on Yemen has prevented the entry of fuel, consequently, a large number of water pumps have stopped working and the costs of transporting water have become untenable.

A historic drought threatens California farms that are supplying much of the food consumed in the United States.

Water is increasingly scarce in the Western US, where 72 percent of the region is in "severe" drought.

Climate change is taking a heavy toll across eastern Africa.