When the City Turned Into a River: The Floods That Paralyzed Nairobi

A note on the figures: this account was written in the week of the floods, drawing on reporting published 7–9 March 2026, while the death toll was still being revised upward. The numbers here are as reported at that time.

A Night Nairobi Will Not Forget

At first, the rain seemed normal. People in the city are used to seasonal storms. The sound of rain tapping on rooftops is a familiar part of life here. Many people simply closed their windows, made some tea, and assumed the storm would pass like it always does.

But this time, it didn’t.

The rain kept falling, slowly at first, then harder, then relentlessly. Hour after hour, the clouds poured water over the city without pause. By midnight, some roads were already filling with water. Drainage channels began overflowing, and small streams running through neighbourhoods started swelling into powerful currents.

By the time morning arrived, Nairobi looked completely different.

Entire streets had disappeared beneath muddy water. Cars were stranded in the middle of highways. In several neighbourhoods, people opened their doors only to find floodwater already inside their homes. Families lifted furniture onto tables and beds, moving fast to save what they could. Neighbours waded out to check on the elderly and carry children to higher ground long before any official help arrived.

Emergency teams moved across the city trying to reach residents trapped by rising water. For many people, the night had turned from a simple rainstorm into a frightening fight to stay safe.

Meteorological data later showed Nairobi received more than 112 millimetres of rainfall within about 24 hours — an amount that can equal what the city normally receives across an entire month (The Guardian).

But the flooding was not only about rain. It revealed problems that have been building inside the city for years. Nairobi has grown quickly into a metropolis of millions. Its infrastructure has not kept pace. Old drainage systems, blocked waterways, and unregulated development created the conditions in which heavy rain becomes a disaster.

More than 40 people across Kenya lost their lives in flooding linked to the storm, with several deaths recorded in Nairobi and nearby areas (Reuters).

These are not numbers. They are families who lost people they loved, workers who lost their homes, and neighbourhoods that began rebuilding overnight without waiting to be asked.

A Month’s Rain in a Single Day

Meteorologists had warned that heavy rains were approaching Kenya. Forecasts predicted strong storms across several regions, including the capital. Even with those warnings, few expected rainfall this intense.

Between Friday morning and Saturday morning, the rain continued pouring over Nairobi, building into a storm that overwhelmed the city’s drainage capacity. Weather stations recorded totals exceeding 112 millimetres in a single day.

When that much water falls in such a short time, the ground cannot absorb it. Rainwater flows instead across every available surface — roads, pavements, rooftops, parking lots. It collects in low areas and overwhelms channels designed to carry stormwater away.

That is exactly what happened. Stormwater surged through streets and highways, turning familiar roads into dangerous currents. Water rushed through residential neighbourhoods, flowing through gates, doors, and courtyards.

Severe flooding hit Westlands, Embakasi, Dagoretti, Roysambu, and parts of the Central Business District. Residents woke to scenes that felt unreal. Roads they used every day had vanished under murky water. Vehicles stood half-submerged. Some drivers abandoned their cars entirely.

The situation worsened as rivers running through Nairobi swelled beyond their banks. Once those rivers overflowed, floodwater spread further into nearby neighbourhoods.

Roads Turned Into Rivers

One of the clearest signs of how severe the flooding had become was the sudden collapse of Nairobi’s transport system.

Major highways that normally carry thousands of vehicles every day became nearly impossible to use. Mombasa Road and Uhuru Highway, two of the city’s busiest routes, were quickly overtaken by rising water.

Drivers found themselves stuck as floodwater surrounded their vehicles. Some tried to push through, but the currents proved stronger than expected. Cars stalled, engines failed, and vehicles began drifting as the water kept moving. Images circulating online showed cars half-submerged in brown floodwater, and drivers climbing onto their roofs to wait for rescue.

Even air travel was disrupted. Flooding interfered with operations at Jomo Kenyatta International Airport, forcing some flights to be delayed or diverted to Mombasa (allAfrica).

For several hours, the city’s entire transport network slowed to a halt. Commuters were stranded, responders struggled to navigate flooded streets, and Nairobi’s normal rhythm of movement was replaced by confusion.

The Human Cost

Whenever disasters like this strike, statistics dominate the headlines. Numbers are reported, death tolls updated, damage estimates calculated. Behind every number is a person.

Authorities confirmed that more than 42 people died across Kenya due to flooding caused by the storm, with several deaths in Nairobi itself.

Some were swept away while trying to cross flooded roads or rivers. Others were caught inside vehicles when water rose suddenly. There were also cases of electrocution caused by damaged electrical infrastructure — when floodwater reaches exposed wiring, an entire street becomes dangerous.

Rescue teams spent hours searching flooded areas and rivers for missing people. In some cases, bodies were recovered from submerged cars and drainage channels.

For families who lost someone, the storm will never be a weather event. It will be the night everything changed.

If you know someone who was in Nairobi that night, or who is still rebuilding, send this to them.

Where the Water Went First

Like most disasters, the flooding did not fall evenly. The heaviest damage landed on neighbourhoods that have been under-resourced by design — communities like Mukuru and Mathare, where residents have built dense, working, deeply organised places on land the city never planned to service.

Many homes there are built from iron sheets and timber. Those materials shelter families well in ordinary conditions. They offer little against rising floodwater. Some houses sit only metres from rivers or drainage channels, so when the rivers overflow, the water goes straight indoors.

Mathare is one of Nairobi’s oldest and most densely populated settlements, home to hundreds of thousands of people along the Mathare River (background). When floods arrive there, damage happens in minutes. Residents often have only moments to gather belongings before water fills their homes. Furniture, clothing, schoolbooks, and documents can be lost at once.

Rebuilding after those losses can take months or years. It is worth naming plainly who does that rebuilding: neighbours, savings groups, church and mosque networks, and residents’ associations that were organising long before the water came and were still organising after it left. We have written elsewhere about how that kind of resolve holds Kenya together.

Why Nairobi Floods So Easily

The storm was intense. But experts say the flooding cannot be blamed on rainfall alone.

Nairobi has grown dramatically over recent decades. Its population has risen rapidly, and development has spread across land that was once open ground. The infrastructure meant to support that city has not kept pace. Urban planners have warned that the drainage system is struggling with the city’s expansion, making floods more likely during heavy storms (The Star).

As more land is covered with concrete, asphalt, and buildings, less rainwater soaks into soil. Water runs quickly across surfaces and collects in low areas. When drainage cannot absorb that surge, flooding becomes unavoidable.

Aging drainage

Many drainage channels were built decades ago, when the population was smaller and rainfall patterns were different. Over time they have clogged with waste, debris, and sediment. Plastic bags and bottles block storm drains, and blocked drains leave rainwater nowhere to go. Illegal construction over drainage channels has made it worse, disrupting the natural flow of water and pushing it into nearby streets.

Building over the water’s path

Over the years, buildings have gone up dangerously close to rivers and streams. In some cases structures sit directly on top of drainage channels. When storms arrive, those buildings act as barriers, preventing water from following its own path. Environmental specialists have repeatedly warned that protecting river corridors is essential. Enforcement has been inconsistent.

Rivers under pressure

The rivers flowing through Nairobi are themselves under strain. Years of pollution and waste dumping have reduced their ability to carry water. Plastic, household garbage, and industrial discharge end up in the river system, and sediment accumulates in riverbeds and dams, reducing capacity. Nairobi Dam, built in 1953 to collect water from the river system, has been significantly reduced in effectiveness by pollution and silt (background). Rivers already clogged with waste overflow much faster than they should.

None of this is only a Kenyan story. The pattern — rapid growth, deferred maintenance, and the poorest ground left last in line — is the same one we traced in a fever they did not cause, and it is why we treat water as a health question in our work across Kenya and Uganda.

The Response

As floodwaters spread, government agencies moved to respond. Emergency teams from the Kenya Red Cross, the National Police Service, the National Youth Service, and St John Ambulance Kenya were deployed to affected areas, and authorities set up emergency coordination centres to manage rescue operations (Kenyans.co.ke).

Rescue teams used boats, trucks, and emergency vehicles to evacuate residents. In some areas, volunteers guided people across flooded streets using ropes and makeshift paths. Thousands received assistance. Much of the first response, as always, came from people who already lived on those streets.

The City Must Prepare for Tomorrow

When the rain finally stopped, Nairobi began returning to normal. The water receded, traffic resumed, businesses reopened.

But the memories remained. Homes had been destroyed. Families had been displaced. Lives had been lost.

The floods were a reminder that Nairobi must prepare for what is coming. Heavy rain will always be part of life in East Africa. The destruction it causes does not have to be. With better drainage, stronger urban planning, and real protection of natural waterways, the city can reduce the impact of future storms.

Until then, every time dark clouds gather over Nairobi, many residents will carry the same quiet fear — that once again, the city might wake up underwater.

I Am Because We Are. And Together, We Heal.

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Sources

• Weather tracker: at least 10 dead in Nairobi after a month’s rain falls in 24 hours — The Guardian, 9 March 2026
• Kenya says death toll from floods nearly doubles to 42 — Reuters, 9 March 2026
• Kenya: Heavy rains disrupt flights at JKIA — allAfrica
• Why Nairobi flooded: experts, officials weigh in — The Star, 9 March 2026
• CS Ruku orders emergency desk nationwide as heavy rains cause flooding in Nairobi — Kenyans.co.ke

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