Aid agencies in Pakistan are warning that unless international assistance increases substantially and soon, many more lives will be at risk. The warning comes as flood waters continue to move further south. Reports say that new areas in southern Pakistan are still being inundated by the floods every hour. Scenes of villagers running from their homes carrying everything they own and of those who did not get out in time and trapped on their roofs are common in the affected areas. Continuous downpours are severely hampering the sporadic relief efforts in northern Pakistan and in Punjab.The United Nations has urged the international community to speed up its humanitarian response to the crisis caused by the devastating floods. The United States and other countries have contributed food, medicine and other supplies. The US has pressed into service 30 helicopters to deliver the relief supplies to the marooned people. The Pentagon says, US forces have rescued 2300 people and delivered 95 tonnes of aid to flood victims so far.So far, the floods have killed more than 1600 people and affected nearly 14 million people in Pakistan's provinces of Khyber Pakhtunkhwa, Punjab and Sindh.