tiger cooling off

A tiger cools off with a block of ice at Karachi Zoo in Pakistan. 

Caretakers at Karachi’s zoo were working to keep animals cool during a deadly heatwave affecting southern Pakistan. The human toll from four days of sweltering conditions had risen to more than 800 by Wednesday, with some 4,000 people being treated at hospitals for heat stroke.

Picture: EPA/SHAHZAIB AKBER