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"These Risks Are Preventable with Early Action": NCDC Issues High Alert for 10 States as Flooding Threatens Cholera, Malaria and Diarrhoeal Disease Outbreaks
Ten Nigerian states have been placed under a high‑alert public health advisory by the Nigeria Centre for Disease Control and Prevention (NCDC), following flood predictions issued by the Federal Ministry of Environment and the Nigerian Meteorological Agency (NiMet) indicating that parts of Adamawa, Enugu, Kaduna, Kogi, Niger, Osun, Oyo, Plateau, Taraba and Kwara states may experience heavy rainfall and flooding between 13 and 17 April 2026.[reference:0] The advisory, signed by NCDC Director‑General Dr Jide Idris, warned that the timing coincides with Nigeria's peak cholera season and that early surveillance data already show increasing cholera activity across multiple states.[reference:1]
"Flooding during this period may increase the risk of cholera and other diarrhoeal diseases, malaria and other mosquito‑borne infections, as well as illnesses linked to contact with contaminated floodwater," the agency stated, noting that possible injuries including drowning and snakebites, as well as disruption of access to healthcare services in affected areas, were also anticipated.[reference:2] The advisory was unequivocal on one point: "these risks are preventable with early action."[reference:3]
The NCDC's alert is layered over a reality that policy has never resolved: flooding is the trigger; the underlying disease is infrastructure — or the absence of it. Without safe water systems, functional sanitation, and waste management that does not collapse under seasonal rain, every rainy season becomes a countdown to the next outbreak. The agency stressed that the risks were preventable with early action, urging residents in at‑risk communities to use only safe water for drinking and cooking by boiling, chlorinating or using bottled water. It also advised regular handwashing with soap and clean water, avoiding contact with floodwater, maintaining proper sanitation including safe disposal of waste and avoiding open defecation, storing and handling food safely to prevent contamination, sleeping under insecticide‑treated nets to reduce mosquito bites, and seeking immediate medical attention upon experiencing diarrhoea, vomiting, fever or any symptoms of illness.[reference:4]
Community leaders and local authorities were also called upon to support sanitation activities and drainage clearance, promote hygiene practices and access to safe water, encourage early reporting of suspected illness, and ensure accurate public health information is widely shared.[reference:5] On its part, the NCDC said it was working closely with State Ministries of Health and relevant partners to strengthen surveillance, enhance preparedness and support rapid response efforts in affected states, adding that state governments were being supported to activate multisectoral response mechanisms, especially in water, sanitation and emergency management.[reference:6]
Data from previous outbreaks in Nigeria demonstrate that flood‑prone states often record spikes in cholera cases during the rainy season, particularly in communities with limited access to safe drinking water and poor waste management. In 2025, Nigeria recorded 22,196 suspected cholera cases and 505 deaths; in the catastrophic 2021 outbreak, the toll reached 69,925 suspected cases and at least 2,323 deaths across 25 states, with case fatality rates in some states driven less by the severity of the infection than by the near‑total absence of timely care in remote, flood‑ravaged communities. Cholera first emerged in Nigeria in 1972 and has since become endemic and seasonal, with outbreaks occurring almost every year, particularly during the April–October rainy season. Only 14 per cent of Nigeria's population of over 200 million has access to safely managed drinking water supply services, while access to safely managed sanitation services was estimated at just 21 per cent nationwide as of 2020. Open defecation is still practised by at least 30 per cent of residents in 14 states. The agency maintained that early action, community vigilance and prompt care‑seeking could prevent outbreaks and save lives.[reference:7]
An Early Warning That Tests the State
The NCDC's public health advisory is as comprehensive a warning as any disease control agency can issue. It identifies the ten states at risk, specifies the diseases that flooding will accelerate — cholera, malaria, diarrhoeal infections — and provides a clear, actionable prevention framework. But the persistence of Nigeria's cholera cycle, year after year, reveals that early warnings alone are not enough. The disease is treatable, the risks are foreseeable, and the deaths, in too many cases, are avoidable. The measure of this season's toll will not be found in the quality of the advisories but in the gap between what was warned and what was prevented.
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