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Pakistan Defence
Pakistan are giving a killer edge to the heat wave which has claimed more than 500 lives across India.
While heat waves are fairly common in May, a number of factors have come together to make the current spell rather extreme. One is the heat transfer from south Pakistan through westerly winds. "In Sindh, temperatures have shot up to 49, even 50 degrees. Westerly winds are bringing with them this extreme, dry heat through a process called advection (transport)," said B P Yadav, director, IMD.