The UN’s Office for the Coordination of Humanitarian Affairs (OCHA) says funding constraints have also affected humanitarian aid.

The agency says more than 835,000 people across the country have been affected by the flooding since May.

People in Jonglei and the two oil-producing states of Unity and Upper Nile in the northern part of the country are reported to be the worst affected.

Last week, Nicholas Haysom, the head of UN peacekeeping mission in South Sudan who visited Bentiu described the situation as “dire”.

He said flood waters were not receding and hundreds of thousands of people remained displaced and in desperate need of assistance.

He said the consequences could be disastrous in terms of food insecurity, lack of healthcare, education and the risk of water-borne diseases.