India, April 29 -- The afternoon heat is as palpable as a solid surface. It is slamming down from the sky, and roaring up from the tarmac. Per the mobile, the temperature is hovering around 41degC. Fruit-seller Zareef has a headache. He gulped water a minute ago; he's thirsty again. This afternoon, the soft-spoken man is selling muskmelons-kharbooja. Even the fruit is hot to the touch. A biker stops, his face covered with a kerchief. "Very sweet, very sweet. 60 rupees a kilo!" The fruit seller murmurs. Zareef is suffering from the prematurely advanced heat of late April, but he isn't alone. Millions across Delhi are bracing against the same heat. Some are able to limit their exposure to it, staying indoors in air-conditioned homes or office...