Pakistani youths cool themselves from a leaking water pipeline during a heatwave in Karachi on June 25, 2015. The death toll from Pakistan's killer heatwave rose to 800 on June 25, 2015, as cloud cover and lower temperatures brought some relief to the worst-hit city Karachi. AFP PHOTO / RIZWAN TABASSUM (Photo credit should read RIZWAN TABASSUM/AFP via Getty Images)
