NiMet Warns of Flash Flood Risk Across Lagos and Coastal States

Flood Alert Issued for Lagos as NiMet Forecasts Widespread Rainfall

The Nigerian Meteorological Agency (NiMet) has issued a flash flood alert for Lagos and several coastal states following forecasts of sustained rainfall across southern Nigeria. The agency warned that continuous downpours could trigger flooding in low-lying and coastal communities, urging residents, motorists, developers and emergency responders to take precautionary measures to minimise risks.

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The warning, contained in NiMet's Weather Outlook for Tuesday, June 30, forecasts light rainfall and thunderstorms during the morning, followed by moderate rainfall across the southern region later in the day. According to the agency, Lagos, Ogun, Ondo, Rivers, Bayelsa, Delta, Cross River and Akwa Ibom are among the states with a heightened likelihood of flash flooding.

Coastal Communities Face Elevated Flood Risk

NiMet said persistent rainfall could overwhelm drainage systems and increase surface runoff, particularly in urban and low-lying coastal areas where drainage infrastructure is already under pressure. The agency advised residents in flood-prone communities to remain vigilant as rainfall intensifies throughout the day.

The forecast also covers other parts of the country. Thunderstorms and moderate rainfall are expected across sections of the North Central region, including the Federal Capital Territory, Nasarawa and Benue, while northern states such as Borno, Adamawa, Taraba, Bauchi, Kano, Kaduna and Sokoto are also expected to experience thunderstorms later in the day.

Safety Advisory for Residents and Motorists

NiMet urged the public to avoid driving or walking through floodwaters and warned that strong winds could precede thunderstorms. The agency also advised residents not to seek shelter beneath tall trees during storms because of the risk of lightning strikes.

Motorists were encouraged to exercise caution during periods of heavy rainfall and poor visibility, while airline operators were advised to obtain airport-specific weather information to support safe flight operations.

Flood Preparedness Remains a National Priority

The latest warning comes as Nigeria continues to experience increased flooding during the 2026 rainy season. Recent incidents have disrupted transportation, damaged homes and businesses, and renewed concerns over urban drainage systems and disaster preparedness.

In Lagos, the state government recently commenced the removal of illegal structures obstructing drainage channels in Agungi, Ajiran and Ikota as part of broader efforts to improve stormwater management and reduce flood risks. Authorities have maintained that protecting drainage infrastructure is essential to enhancing urban resilience and safeguarding lives and property.

The Federal Government has also intensified national flood preparedness. Earlier this month, the National Economic Council approved ₦83.2 billion under the Anticipatory Action Task Force to strengthen measures against flooding and other climate-related emergencies. According to the Coalition for Disaster Resilient Infrastructure, disaster-related events cost Nigeria and other African countries an estimated $12.7 billion annually through damage to infrastructure and buildings.

Implications for Housing and Urban Development

The renewed flood alert highlights the importance of integrating climate resilience into urban planning and housing development. For developers, property owners and public authorities, effective drainage infrastructure, strict development control and compliance with environmental regulations remain critical to reducing flood risks and protecting investments.

As urbanisation accelerates across Nigeria's coastal cities, experts continue to emphasise the need for resilient infrastructure, sustainable land use planning and proactive flood management to minimise the social and economic impacts of extreme weather events.

Conclusion

NiMet's latest flash flood warning underscores the need for heightened preparedness as the rainy season intensifies across southern Nigeria. With Lagos and other coastal states facing elevated flood risks, coordinated action by government agencies, developers, emergency responders and residents will be essential to protecting lives, infrastructure and property while strengthening long-term urban resilience.

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