South Sudan: Floods - Jul 2025

As of 30 July, flooding continues to impact an estimated 80,000 people in Mayendit and Bor South counties, in Unity and Jonglei states. While no flood-related displacement has been reported to date, communities remain at heightened risk due to prolonged exposure to floodwaters. By the end of July, 84,606 confirmed cholera cases and 1,477 related deaths were reported. Stagnant floodwaters, poor sanitation, and limited access to safe drinking water are exacerbating public health risks and increasing the likelihood of further disease outbreaks. Humanitarian partners are closely monitoring the situation and coordinating with health and WASH actors to strengthen disease surveillance, promote hygiene awareness, and address critical water and sanitation gaps. (OCHA, 31 Jul 2025)

Above-normal rainfall is forecast between July and November 2025, with an estimated 1.6 million people at risk of flooding across South Sudan. On 30–31 August, a section of the dyke on the western side of Old Fangak broke overnight, submerging the entire town. As of 1 September, flooding has affected approximately 263,000 people across Unity, Jonglei, and Upper Nile states. On 2 September, the Humanitarian Coordinator with Government led a high-level visit to Malakal, Upper Nile State, to support flood mitigation efforts and engage with communities at risk of flooding and cholera. (ECHO, 4 Sep 2025)

Heavy rainfall and rising water levels of the River Nile continue to inundate multiple areas across the country. As of 9 October, flooding has affected 886,106 people in 26 counties across six states, with Jonglei and Unity accounting for over 91 per cent. Nearly 287,300 people have been displaced across 16 counties, sheltering on higher ground amid widespread damage to homes, farmland, and infrastructure. Of the people affected, 624,289 people are in Jonglei State, about 182,860 people are in Unity State, some 29,374 are in Upper Nile State, about 24,505 are in Central Equatoria State, 14,500 are in Western Equatoria and 10,578 people are in Warrap State. (OCHA, 10 October 2025)