The Nigerian Meteorological Agency has issued a flash flood alert for 27 states, warning that many parts of the country face an elevated risk of dangerous flooding as the rainy season intensifies.

The advisory follows weeks of persistent rainfall that has left soils across large swathes of Nigeria heavily saturated. With the ground already soaked, additional downpours are now more likely to result in rapid surface runoff and sudden flooding, especially in vulnerable locations.

NiMet identified Taraba, Sokoto, Borno, Zamfara, Kebbi, Katsina, Kaduna, Nasarawa, Plateau, Adamawa, Kwara, Kogi, Oyo, Ogun, Lagos, Osun, Ekiti, Delta, Edo, Abia, Imo, Anambra, Enugu, Akwa Ibom, Cross River, Rivers and Bayelsa as states where flash floods are likely during the current spell of widespread rainfall.

The agency warned that low-lying, urban, coastal and poorly drained areas are at particular risk. In cities such as Lagos and Abeokuta, blocked drains and rapid urbanisation have historically worsened the impact of heavy rain, turning streets into rivers within hours.

NiMet cautioned that the anticipated heavy rainfall could disrupt transportation networks, trigger traffic gridlock and force road closures. Motorists were urged to avoid driving through floodwaters, while aviation operators were advised to be mindful of poor visibility and stormy conditions during intense downpours.

The agency also highlighted potential damage to roads, bridges and drainage systems, as well as the risk of waterlogging on farmlands that could lead to crop losses and threaten food security in some communities.

Public health officials have been advised to prepare for a possible rise in waterborne diseases, as stagnant floodwater and overwhelmed sanitation systems can create conditions for outbreaks of cholera and other infections.

To reduce the impact of the looming floods, NiMet urged residents to closely follow weather forecasts and heed flash flood advisories. Communities were encouraged to clear drains and gutters, secure loose outdoor items, reinforce vulnerable structures and move to higher ground when necessary.

The agency called on federal and state emergency management bodies, community leaders and other stakeholders to strengthen preparedness and response plans, stressing that early action can save lives and property.

“An informed community is a prepared community. Know the risks and act early,” NiMet said, underscoring the need for collective vigilance as the rains intensify.