In recent weeks, widespread flooding has engulfed large parts of Jonglei, Upper Nile and Unity states in the north of the country.

The agency’s representative in South Sudan, Marie-Helene Verney, said that “if the flooding continues, up to 400,000 people are likely to be displaced by the end of the year, exceeding flood displacement levels seen in 2024.”

The situation is expected to be at its worst between September and October and threatens to “cut off entire communities, exacerbate hunger and heighten protection risks, particularly for women and girls,” Ms. Verney added.

For several years, South Sudan has faced an ongoing humanitarian crisis due to underdevelopment, disasters and conflict that has displaced many communities. Recurrent floods have exacerbated this displacement, destroyed homes, and threatened livelihoods across the nation.

“Homes, schools, health facilities, farmlands, and pastures have been flooded,” said the UNHCR representative, “devastating livestock and inundating safe water sources and latrines, which have worsened sanitation and heightened health risks.”

Stagnant water, combined with limited access to safe drinking water, is raising the threat of further disease outbreaks on top of the ongoing cholera crisis, which had already affected over 12,000 internally displaced persons (IDPs) and 3,100 refugees by the end of August.

UN continues providing aid

In 2025, UNHCR, in collaboration with the South Sudanese authorities and UN partners, has continued to provide life-saving aid, including cash, emergency shelters, and plastic sheeting to 150,000 of the most vulnerable flood-affected individuals.

Over the past five years work has been carried out to mitigate flood impacts by reinforcing dykes, prepositioning supplies, supporting livelihoods, and assisting displaced communities, including IDPs.

UNHCR has appealed for more funds to carry out its life-saving work. As of 31 July, it had only received a third of the nearly $300 million required to protect and assist displaced people and local host communities in the country.

In Unity state, which is 70 per cent underwater, UNHCR has significantly scaled down operations due to the funding shortfall, leaving thousands of people in a more precarious situation.

Supporting climate resilience

To mitigate the ongoing crisis in South Sudan, the United Nations Office for Project Services (UNOPS) recently signed a $9.9 million Climate Resilience Project in South Sudan with the Ministry of Water Resources.

UNOPS continues to support efforts to strengthen climate resilience and assist flood-affected and refugee-hosting communities in South Sudan.