As floodwaters recede, Pakistani families return home to Bassera village in Punjab province on Friday, August 20.
With the number of homeless as a result of the flooding rising to more than 4 million, U.N. chief Ban Ki-moon called the crisis a "slow-motion tsunami" that is expected to grow.
An elderly Pakistani sits with his belongings as he waits for transportation back home on Friday.
A Pakistani family takes shelter in a hut in the flooded town of Rohri on Friday.
As the floodwaters recede, Pakistanis return home to Bassera village in Punjab province on Thursday, August 19.
Pakistani villagers ride through floodwaters with their belongings on a cart in Sanawa, in Punjab province, on Thursday.
Pakistani villagers pile sandbags along a flooded street in Sanawa on Thursday.
A man amid the rubble of his village of Tarnab, in Khyber Paktunkhwa, on Wednesday, August 18.
A boy carries a bag of non-food relief supplies at a UNHCR distribution site in Tarnab, Wednesday.
A boy carries non-food relief supplies from a UNHCR distribution site in Tarnab, Wednesday.
A man hauls a tent from the UNHCR distribution site in Tarnab on Wednesday.