Pakistan's Prime Minister has described the floods devastating his country as the worst in its history.
There are fears that flood waters are affecting up to 12 million people in the two worst affected northern provinces alone.
In the southern province of Sindh, at least half a million people have been evacuated from areas at risk of more flooding.
An estimated 650,000 homes have been destroyed and 1.4 million acres of crop land ruined. The cost of rebuilding roads, dams and power infrastructure has been put at £60million.
Prime Minister Yusuf Raza Gilani, addressing the nation for the first time since the disaster struck after visiting flooded areas, said: "At this time of crisis I would like to appeal to the international community to support Pakistan to help alleviate the suffering of the flood affected people.
"Let me at the same time appreciate the quick response by some members of the international community who have immediately rushed goods and provided other support. I would take this opportunity to appeal to overseas Pakistanis to extend support to the people of their homeland in coping with their losses and suffering,"