Lagos Blames Rising Lagoon Water Levels for Worsening Flooding
The Commissioner for the Environment and Water Resources, Tokunbo Wahab
The Lagos State Government has attributed the flooding experienced across several parts of the state to a significant rise in lagoon water levels, explaining that elevated water levels are preventing stormwater from draining efficiently into the lagoon. The government says the situation is temporary and is being closely monitored as the rainy season continues.
Commissioner for the Environment and Water Resources, Tokunbo Wahab, disclosed that the lagoon water level has risen by approximately one metre, creating what experts describe as a tidal locking effect. This condition slows the discharge of stormwater from drainage channels into the lagoon, causing temporary flooding on roads and within low-lying communities.
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Rising lagoon levels disrupting drainage system
According to the state government, Lagos' extensive drainage network depends on gravity to channel stormwater into the lagoon. However, when lagoon water levels rise significantly, drainage channels cannot discharge water efficiently, leading to temporary accumulation of floodwater.
Wahab explained that as rainfall subsides and lagoon levels gradually recede, trapped stormwater is expected to drain naturally, reducing flood conditions across affected areas. He urged residents to remain patient and exercise caution while government agencies continue monitoring the situation.
Coastal geography continues to shape flood risk
The latest flooding highlights the structural challenges associated with Lagos' coastal geography. According to the state government, approximately one-third of Lagos consists of lagoons, rivers, creeks, swamps and wetlands, while parts of the metropolis—particularly around Lagos Island—lie below sea level.
Officials have consistently maintained that the city's flood risk is influenced by a combination of natural and human factors, including:
Rising lagoon and sea levels.
Climate change and heavier rainfall.
Rapid urbanisation.
Loss of wetlands and mangrove ecosystems.
Illegal land reclamation along coastal corridors.
Tidal locking, which prevents stormwater from flowing into receiving water bodies during periods of elevated water levels.
Implications for housing and urban development
Flooding remains one of the most significant environmental risks facing Nigeria's commercial capital. For the housing sector, prolonged flooding threatens residential communities, transport infrastructure, commercial property and public utilities while increasing maintenance costs for property owners.
The recurring challenge also reinforces the need for resilient urban planning, improved drainage infrastructure and stricter development controls in environmentally sensitive areas. As Lagos continues to expand, integrating flood resilience into housing and infrastructure projects will be critical to protecting investments and supporting sustainable urban growth.
Industry experts have increasingly emphasised the importance of preserving wetlands, improving drainage maintenance and enforcing planning regulations to reduce long-term flood exposure across the metropolis.
Government continues monitoring conditions
The Lagos State Government said relevant agencies remain on alert and will continue implementing measures to reduce the impact of flooding throughout the rainy season. Authorities also encouraged residents to avoid dumping waste into drainage channels, comply with environmental regulations and remain vigilant during periods of heavy rainfall.
Outlook
The government's latest assessment underscores the growing influence of climate-related and coastal factors on Lagos' flood management challenges. While rising lagoon water levels may subside naturally after rainfall decreases, the incident highlights the importance of long-term investments in drainage infrastructure, climate adaptation and resilient urban planning to safeguard housing, businesses and critical infrastructure in one of Africa's fastest-growing cities.
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