The United Nations appealed for $460 million in flood relief, donors have already pledged $150 million.
A spokesman for U.N humanitarian operations said that the flooding in Pakistan could require billions of dollars of aid for farmers.
The city of Larkana is threatened by floodwaters.
The Punjab Emergency Service rescued 375 people.
President Zadari flew into a flooded area to witness the devastation.
The floods have destroyed 500,000 tons of wheat.
Kuwait sent a military aircraft full of aid to Pakistan.
The Pakistani community of Abu Dhabi urged people to give Zakat to the victims of the floods.
Food prices have increased dramatically in Pakistan as a result of the floods.
