When the Wetland Remembers: The Story Behind Nairobi’s Flooded Streets

When the Wetland Remembers

Last night Nairobi’s Central Business District was drowning again. Heavy rains poured relentlessly over the city, turning streets into muddy rivers and trapping thousands of weary commuters who only hours ago were leaving their offices hoping to get home before nightfall. Instead, they stood stranded in ankle-deep water, watching matatus crawl helplessly through flooded streets while boda bodas attempt risky shortcuts along pavements and raised walkways.

The rain has exposed a truth that the city often forgets: Nairobi was once a vast wetland system. Long before skyscrapers and highways defined the skyline, the land where the CBD now stands absorbed water through swamps, marshes, and seasonal streams. These wetlands acted like natural sponges, quietly regulating water flow and preventing floods.

But over time the wetland was buried under concrete, asphalt, and steel. Rivers were confined to narrow channels, natural drainage paths were blocked, and open land that once absorbed rainfall was replaced by buildings and parking lots. When heavy rains fall today, the water has nowhere to go.

Last night that forgotten history was flowing back through the streets.

Along Tom Mboya Street, commuters clutched their bags above the waterline as they carefully stepped through flooded pavements. A bus stalls in the middle of the road, forcing passengers to disembark into the murky water. Some laugh nervously at the absurdity of it all, while others stare silently at their phones, trying to figure out how long the journey home will take.

The situation is worsened by poor drainage systems that are frequently clogged with debris and plastic waste. When the rains intensify, stormwater overwhelms these blocked channels and spills back onto the roads. Pothole-ridden streets quickly become pools, making traffic nearly impossible to navigate.

What should have been a short evening commute becomes a slow and frustrating struggle.

Yet beneath the chaos lies an important reminder. Cities cannot erase nature without consequence. Nairobi’s concrete jungle may dominate the skyline, but the land beneath it still remembers what it once was.

And every time the skies open with heavy rain, the old wetland briefly returns to reclaim its space.