On a warm Sunday morning, Sivaramakrishna Dikshithar got into a tub filled with water in the precincts of a Shiva temple in Pallikaranai, a Chennai suburb. Holding a Shivling in his hands, he went into a deep meditative prayer for nearly thirty minutes as his devotees formed a circle and chanted mantras. The 64-year-old priest was invoking Varuna—the god of rain—for urgent showers to end a crippling dry spell that has sparked a severe water crisis in Tamil Nadu, including capital Chennai.