Meera Subramanian writes:

India’s water crisis offers a striking reminder of how climate change is rapidly morphing into a climate emergency. Piped water has run dry in Chennai, the capital of the southern state of Tamil Nadu, and 21 other Indian cities are also facing the specter of “Day Zero,” when municipal water sources are unable to meet demand.

Chennai, a city of eight million on the Bay of Bengal, depends on the fall monsoon to provide half of the city’s annual rainfall. Last year, the city had 55 percent less rainfall than normal. When the monsoon ended early, in December, the skies dried up and stayed that way. Chennai went without rain for 200 days. As winter passed into spring and the temperature rose to 108 degrees Fahrenheit, its four water reservoirs turned into puddles of cracked mud.

Some parts of the city have been without piped water for five months now. Weary women with brightly colored plastic jugs now await water tankers, sometimes in the middle of the night. On June 20, the delayed summer monsoon arrived as a disappointing light shower.

These water crises are now global and perennial. Day Zero plagues cities from Cape Town to Mexico City to São Paulo, Brazil. Nearly half of the human population is living with water scarcity, inhabiting places unable to fully meet their drinking, cooking and sanitation needs. [Continue reading…]