Villagers have had their homes and livelihoods destroyed as floods sweep through Sudan, reports aid agency Plan International.
More than 150,000 have been hit and 11 killed after weeks of heavy rain around the capital Khartoum and surrounding areas.
With further poor weather forecast, Plan is preparing to help survivors, including children and pregnant women with shelter.
"It is feared that additional rains will further deteriorate the situation," says Plan's emergency response manager in Sudan, Kamal Awouda.
"It may affect the movement of people, electricity power supply, telephone communication and water systems."
Further rains could cause the Blue Nile River to burst its banks, while standing water could disrupt the transportation of food and other essential goods.
More than 15,000 homes have been destroyed and a further 11,500 damaged across nine states.
"Children are usually the most affected by disasters," says Mr Awouda. "We will strive to ensure that they are protected and their needs fulfilled."