Countries: South Sudan, Sudan
Source: UN Office for the Coordination of Humanitarian Affairs

Please refer to the attached file.
Crisis overview
South Sudan continues to face severe humanitarian emergencies driven by climate shocks, relentless violence, multiple disease outbreaks and a struggling economy. These intersecting crises have systematically eroded community resilience, shattered essential services and displaced millions of people. In 2026, over 10 million people, two-thirds of the population are projected to require some form of humanitarian assistance. The humanitarian situation is characterized by acute food insecurity, widespread displacement, fragile health and education systems, and severe protection risks, particularly for women, children, people with disabilities and other vulnerable groups who face heightened exposure to gender-based violence, exploitation and harmful coping mechanisms such as early and forced marriage.
Climate Variability
South Sudan remains one of the countries most affected by the global climate crisis, ranking second on the 2025 INFORM Risk Index. Recurrent and overlapping climate shocks, catastrophic floods and prolonged droughts continue to undermine resilience and entrench humanitarian needs. Since 2019, consecutive flash and riverine floods have affected more than one million people annually. In 2025, the lasting impacts of the 2024 El Niño event produced a severe flood-drought paradox: while parts of Greater Upper Nile, Unity, and Jonglei States faced extensive flooding that affected over 1.3 million people and displaced over 375,000 as of end of November 2025, at the same time some northern and south-eastern regions experienced prolonged dry spells. This dual shock devastated crop production, decimated livestock, and further strained already scarce water resources. Women and girls, who are often responsible for water collection and food preparation, have been disproportionately affected, facing increased workloads, reduced access to essential services and heightened exposure to gender-based violence during displacement and resource scarcity.
These cumulative climate impacts have surpassed local coping capacities, leaving communities with little time or resources to recover between shocks. The erosion of livelihoods has also deepened gender inequalities, limiting womenâs access to income-generating opportunities and decision-making spaces. Without scaled-up anticipatory action and investment in climate-resilient programming, climate-driven humanitarian needs are expected to remain severe throughout 2026 and beyond.
Conflict
South Sudanâs conflict dynamics are driven by political fragility, ethnic tensions, and competition over scarce resources. Since March 2025, renewed clashes between government forces and opposition groups, particularly in Greater Upper Nile and the Equatorias, have intensified instability. Rising political polarization has fuelled widespread violence across Upper Nile, Jonglei, Unity, and Western and Central Equatoria throughout 2025, resulting in civilian casualties, mass displacement, and major disruptions to humanitarian operations and basic services. Spillover from Sudanâs conflict, including the influx of displaced people to South Sudan and negative economic impacts have deepened humanitarian needs in the country. Many of the affected counties were already highly vulnerable due to food insecurity, recurrent floods, and disease outbreaks, including surging cholera cases. Insecurity and access constraints limit partnersâ ability to reach those most in need, with women, children, persons with disabilities, and other at-risk groups facing heightened exposure to violence, family separation, and restricted access to life-saving services.
Inter-communal violence also escalated in 2025, driven by political fragility and resource competition. In Jonglei and Upper Nile, clashes between armed youth groups and rival communities, often linked to cattle raiding and retaliatory attacks, evolved into large-scale, militarized assaults. Coordinated raids in Duk County in February left multiple civilians dead and dozens injured, while similar attacks in Eastern and Western Equatoria caused heavy casualties, including among women and children, and triggered mass displacement. Traditional disputes over grazing land and water have increasingly turned violent, amplified by widespread small arms and weakened customary conflict-resolution systems. These dynamics have destroyed livelihoods, deepened mistrust among communities, and entrenched cycles of violence.
Climate stress further acts as a conflict multiplier. In flood-affected areas, displacement has pushed pastoralists into farming zones, reigniting farmer-herder clashes, while drought-stricken regions face renewed competition over water points and grazing land. These pressures have contributed to severe human rights violations, including killings, abductions, forced displacement, and pervasive sexual and gender-based violence, disproportionately affecting women and girls. Combined with political instability, these localized conflicts are driving South Sudan toward a more entrenched humanitarian emergency.
Sudan Crisis
The conflict in Sudan, now entering its third year, continues to place immense pressure on South Sudanâs humanitarian and socio-economic systems. By end of November 2025, nearly 1.3 million refugees and returnees had entered South Sudan since April 2023, with an additional 380,000 arrivals projected by the end of 2026.
The influx has pushed host communities and services to a breaking point. In Renk, Maban, and surrounding areas, water systems, health facilities, and schools are operating at 300-400 per cent of their capacity. The strain on services has disproportionately affected women and girls, who often shoulder caregiving responsibilities and face heightened risks of gender-based violence (GBV), particularly in overcrowded transit and reception centres. Disrupted cross-border trade and inflation have driven up food and fuel prices, deepening poverty among both hosts and new arrivals and increasing tensions over land and resources, including reports of evictions and disputes over customary land rights. With humanitarian funding declining, competition over limited assistance risks further instability.
Sudanâs collapsing health system has also contributed to the cross-border spread of communicable diseases, including cholera, measles, and hepatitis E. The ongoing cholera outbreak in South Sudan originated in Sudan.
Disease Outbreaks
As of November 2025, South Sudan was battling multiple concurrent disease outbreaks including cholera, hepatitis E, and mpox further straining an already fragile health system. The country is facing its largest cholera outbreak on record, both in scale and geographic spread, with over 96,000 cases and nearly 1,600 deaths reported as of end of November. Years of recurrent flooding continue to drive a surge in endemic diseases such as malaria, which remains a leading cause of illness and death nationwide. Between January and October 2025, nearly 3.2 million suspected malaria cases and 784 suspected malaria-related deaths were recorded.
Mpox has re-emerged as a significant public health concern, with 28 confirmed cases as of November 2025 mainly in Juba County, with additional cases in Rumbek and Malakal. Although no deaths have been reported, limited surveillance capacity, underfunded response teams, and operational constraints hinder timely case investigation and contact tracing. Hepatitis E also remains persistent in flood and displacement-affected areas, especially Rubkona, Renk, and Fangak with more than 9,000 cumulative cases and a 1.3 per cent case fatality rate. These outbreaks are compounded by deteriorating public health infrastructure, including damage to 144 health facilities during flooding. Poor access to safe water and sanitation, coupled with overcrowded displacement sites, continue to heighten the risk of disease transmission. Gaps in immunization coverage have weakened population immunity, increasing the risks for children and other vulnerable groups. Acute respiratory infections and diarrhea diseases remain widespread amid prolonged humanitarian strain and an overstretched health system.
Despite recent cholera vaccination campaigns and vector control efforts, significant gaps persist in surveillance, reporting, and emergency response. Only an estimated 44 per cent of the population has reliable access to primary health care. The health system remains heavily dependent on humanitarian support, underscoring the urgent need for sustained and predictable funding to strengthen integrated prevention, detection, and response capacities nationwide.