As many as two and a half million people have been affected by the devastating floods in north west Pakistan according to the International Red Cross.
At least 1,500 people are now thought to have died and up to 27,000 people remain cut off including over a 1,000 tourists in the Swat valley.
Food is scarce and water supplies are contaminated giving rise to fears of cholera spreading among the many homeless people.
Islamists charities – some with suspected ties to militant groups – have been organising aid efforts of their own putting pressure on a government facing growing criticism for its response to the disaster.
The most severely affected areas line the banks of the Indus river which flows south from Pakistan administered Kashmir in the north.
Hundreds of thousands of people have poured into the city of Nowshera where impromptu anti-government demonstrations have been held.
Angry refugees are accusing the authorities of abandoning them to their fate.
The UN, the EU, America and the UK are offering a combined total of some 58 million euros to assist in the relief effort.
The US embassy in Islamabad has ordered 12 temporary bridges to replace some of those destroyed by the flood waters.