When the Rains Come for Us Again,Recurrent Flooding, Displacement, and the Urgent Resilience Imperative in Lagos

Every year, as the skies over Lagos darken and the first heavy rains of the season arrive, millions of residents brace not with relief, but with dread. The water that should nourish does notstay in rivers and reservoirs, it creeps under doorways, swallows streets, and forces families from their homes. For too many Lagosians, the rainy season is not a season of renewal. It is a season of loss.

We are in the thick of it again.

A City Built on Water, Betrayed by It

Lagos is, in many ways, a city that was never supposed to be this large. Sprawling across a network of lagoons, creeks, and low-lying coastal land, it is home to an estimated 16 to 22 million people, Africa’s most populous city, and one of its most flood-vulnerable. The geography alone is challenging. But decades of unplanned urban expansion, the systematic paving over of natural drainage corridors, and the relentless dumping of refuse into waterways have turned manageable seasonal rains into recurring catastrophes.

In 2025, Lagos State Governor Babajide Sanwo-Oluacknowledged that over 57,000 residents were impacted by flooding in the state, with more than 3,000 displaced and countless homes damaged, and that was in a single calendar year. Communities in Ikorodu, Surulere, Mushin, Lekki, and Ajah are not outliers. They are the norm.

Now, heading into the 2026 rainy season, Nigeria’s Hydrological Services Agency (NIHSA) and the Lagos State Ministry of Environment have issued forecasts of above-normal rainfall, up to 3,030 mm in coastal zones — alongside warnings of severe tidal locking along Lekki, Ajah, and Badagry. Ikorodu and Isheriface the additional threat of riverine flooding linked to controlled releases from the Oyan Dam upstream. On the Mainland, flash floods triggered by choked drainage infrastructure continue to punish areas like Surulere and Mushin with each downpour.

The science is clear, the pattern is documented, and the warnings are loud. What remains tragically inconsistent is the response.

The True Cost of Each Flood

Flood statistics carry an anaesthetic quality, large numbers that distance us from their human weight. Let us resist that.

When floodwaters swallowed the Agric and Ijede communities of Ikorodu in August 2025, homes and cars were submerged overnight, and families fled with what they could carry. Researchers on the ground described streets turned into rivers, children missing school for weeks, and small traders losing entire livelihoods in hours. A woman photographed carrying her child through chest-high water near Owode-Elede became one of the defining images of Nigeria’s 2025 rainy season.

These are not isolated tragedies. Nationally, NEMA’s 2025 flood dashboard recorded over 241 deaths, more than 839 injuries, and close to 433,578 people affected across 27 states. Over 144,000 individuals were displaced. More than 52,000 houses were destroyed or damaged. Nearly 75,000 farmlands were submerged, a direct driver of food insecurity in a country where the World Food Programme projects that nearly 35 million people already face severe hunger.

Flooding in Lagos and across Nigeria is not merely an environmental event. It is an accelerant of poverty, a disruptor of education, a threat to public health, waterborne diseases surge in the aftermath, and increasingly, a trigger for urban displacement that has no formal end point. Many displaced residents do not return to their original homes. They become invisible statistics in an already strained city.

Why It Keeps Happening

Understanding Lagos’ flooding crisis requires honest accounting of its multiple causes, none of which operate in isolation.

Unplanned urbanisation is perhaps the most consequential factor. As the city grew faster than its infrastructure could absorb, wetlands and mangroves, nature’s own flood buffers,were drained and built upon. Natural drainage pathways were interrupted. Today, when it rains heavily for even a few hours, the water has nowhere to go.

Failing drainage infrastructure compounds the problem. Many of the city’s drainage channels are undersized for current rainfall intensities, and a significant portion are clogged with solid waste. Residents have repeatedly noted that refuse dumped into gutters, plastic bags, sachets, construction rubble, effectively dismantles whatever drainage capacity exists. The infrastructure that remains is ageing and overwhelmed.

Climate change is not a future threat here, it is a present reality.Rising sea levels intensify tidal locking along the coast, preventing floodwaters from draining into the ocean at all. Rainfall events are becoming more intense and less predictable. The combination of a warmer Atlantic, changing seasonal patterns, and Lagos’ specific coastal geography creates conditions that will worsen with every passing decade.

Governance gaps remain. Early warning systems exist but community penetration is inconsistent. Urban planning regulations are often unenforced. The Lagos State Resilience Office (LASRO) has outlined frameworks for adaptation, but implementation is uneven and underfunded. Meanwhile, the burden falls hardest on low-income communities living in the most flood-exposed neighbourhoods, those with the least capacity to absorb losses and the fewest options for relocation.

What Residents Must Know: Safety Measures for the 2026 Rainy Season

While structural change requires political will and long timelines, there are concrete actions that residents, particularly in high-risk areas, can take right now to protect themselves and their families.

Know your zone. The 2026 NIHSA flood risk maps identify high-risk areas including Lekki, Ajah, Badagry (coastal tidal flooding), Ikorodu and Isheri (riverine flooding), and Surulere, Mushin, and Agege (flash flooding from drainage failure). If you live in or near these zones, treat every heavy rainfall forecast as a serious alert.

Prepare a household flood kit. This should include: waterproof bags for essential documents (birth certificates, property papers, IDs); a battery-powered or hand-crank radio for emergency broadcasts; a torch with extra batteries; clean drinking water stored above floor level; basic first aid supplies; and emergency cash in small denominations.

Know your evacuation route before you need it. Identify the nearest elevated ground or public building and agree on a family meeting point. Do not wait for waters to begin rising before deciding where to go.

Do not walk or drive through floodwater. Floodwater in Lagos is frequently contaminated with sewage, chemicals, and debris. Even shallow-looking water can hide open manholes, electrical hazards, or drop-offs. Many flood-related deaths occur not from drowning in homes but from accidents during movement through floodwater.

Protect your electrical systems. If flooding is anticipated, switch off electricity at the mains before water reaches your home. Do not attempt to operate electrical appliances in wet or flooded conditions.

Store food and medicines above floor level. If flooding has previously reached your property, elevate key items,medications, food supplies, important electronics, to shelves or higher floors in advance of rain.

Monitor official channels. Follow the Lagos State Emergency Management Agency (LASEMA) on social media and listen to local radio for alerts. NIHSA publishes flood advisories during the season. Do not rely solely on social media rumours, which can spread misinformation during crises.

Support community drainage maintenance. The single most impactful community-level intervention is keeping drains clear of solid waste. Refuse dumped into gutters travels downstream, creates blockages, and causes floods that affect entire neighbourhoods. This is a collective responsibility.

Have a plan for vulnerable household members. Elderly relatives, young children, people with disabilities, and pregnant women require specific evacuation planning. Ensure these family members can be moved quickly and safely before floodwaters make movement hazardous.

What Must Change at Scale

Individual preparedness saves lives in the short term, but it is not a substitute for structural reform. The communities most devastated by Lagos flooding are the same ones least able to absorb another season of loss.

The Lagos State Government’s stated commitments, improved early warning systems, drainage expansion, sustainable land use planning, and collaboration with federal agencies and humanitarian organisations, are the right framework. What is needed is urgent acceleration of implementation, independent monitoring of commitments, and genuine inclusion of flood-affected communities in planning decisions.

The Lagos State Resilience Office’s coordination role must be resourced and empowered, not merely ceremonial. Urban planning enforcement must be extended to all income levels, not just applied when it is convenient or profitable. The systematic encroachment on floodplains and drainage corridors must be halted, and where feasible, reversed.

At the continental level, the 2026 rainy season is a reminder that urban flooding is one of Africa’s most underaddressed climate crises. Lagos is the continent’s most visible example, but cities from Accra to Dar es Salaam to Kinshasa face structurally similar challenges. The science, the data, and the human evidence all point in the same direction. The gap is not knowledge. It is action.

The Water Will Come. The Question Is What We Do When it Arrives

There is a particular cruelty in a disaster that announces itself months in advance and still catches a city unprepared. Lagos has the forecasts. It has the maps. It has the lived experience of millions of residents who have survived, and in too many cases have not survived, the floods of preceding years.

What happens this season, and the seasons after it, will depend on whether institutions treat the rainy season as an emergency to be responded to, or as an opportunity to finally build something more resilient. For the woman wading through chest-high water with a child in her arms, for the trader watching inventory float out of a flooded stall, for the family sleeping in a school corridor while their home dries out, that distinction is not abstract. It is everything.

The rains are here. The window for preparation has not fully closed. But it is narrowing, as it does every year, until the water decides the matter for us. Let’s get safetysmart!