A Pakistani resident helps a heatstroke victim at a market area during a heatwave in Karachi on June 23, 2015. The death toll from a heatwave in southern Pakistan on June 23 passed 450 as medics battled to treat victims after imposing a state of emergency in hospitals, health officials said. AFP PHOTO / Rizwan TABASSUM / AFP / RIZWAN TABASSUM        (Photo credit should read RIZWAN TABASSUM/AFP/Getty Images)