Abnormal heavy monsoon rains and melting glaciers triggered floods that have submerged a third of the country and killed at least 1,191 people, including 399 children. The United Nations has appealed for $160 million to help with what it calls an "unprecedented climate catastrophe".
Hundreds of thousands of displaced people are in urgent need shelter, food and clean water, with the threat of more flooding to come on Wednesday. International aid agencies have asked for a relaxation on imports of food from Pakistan's old rival and neighbour India, Finance Minister Miftah Ismail said.
Colossal volumes of water are pouring into the Indus river, spilling out along its length and leaving vast tracks of land submerged.