Getting your Trinity Audio player ready… Floods do not create inequality. They expose it. In recent weeks, images from Nairobi showed residents forming human chains from public service vehicles to help strangers reach higher ground. Commuters waded through muddy floodwaters trying to get home. Cars were swept away. Owners of shops in the central business district watched their stock disappear under rising water. Headlines across local and international media focused on climate change. Similar tragedies have unfolded across the region, from floods in Mozambique earlier this year to landslides in Ethiopia that claimed more than a hundred lives. Climate change is undoubtedly part of the story. But it is not the whole story. The floods in Nairobi reveal something deeper about how many sub-Saharan cities were built: not for dignity, but for survival. Cities designed for dignity allow people to get home safely, maintain their livelihoods, and live with a basic sense of security even when the rains come. Yet in many African capitals, floods routinely turn everyday life into a struggle for safety and stability. When a city floods, it reveals whom the planning process protected and whom it did not. Floods reveal the geography of inequality Nairobi is a city of striking contrasts. Affluent neighbourhoods often sit on higher ground, with controlled zoning, better drainage systems, and abundant tree cover that naturally absorbs excess water. These areas also benefit from strong resident associations that enforce planning regulations and resist uncontrolled development. Meanwhile, many low-lying areas where ordinary Kenyans live and work remain vulnerable. Informal settlements expand along riverbanks and floodplains. Businesses in densely populated commercial zones absorb enormous losses whenever heavy rains arrive. For years, these realities existed side by side with little intersection. The most vulnerable communities bore the brunt of disasters with limited public attention. Those struggling daily to make a living rarely have the time or political leverage to organize for better urban planning. But nature eventually forces a reckoning. Water does not negotiate. When rivers burst their banks, they follow their natural paths regardless of what has been built in their way. Development on riparian land and unchecked construction inevitably return as disasters during heavy rains. Floods reveal the geography of the inequality embedded in the city’s design. Yet the deeper issue begins long before the rain falls. The capital city trap For decades, Nairobi has been the symbolic centre of the Kenyan dream. Generations grew up with a simple aspiration: leave the village, move to Nairobi, and build a future. Like New York in Alicia Keys’ famous lyric, Nairobi became the “concrete jungle where dreams are made”. The numbers explain why. Research from the Kenya Bankers Association indicates that Nairobi hosts nearly 59 per cent of the country’s micro, small, and medium enterprises. Although the city’s resident population is roughly 4.8 million, its daytime population approaches 6 million as workers commute into the capital. Opportunity is concentrated here. Universities, financial capital, infrastructure, and professional networks all converge in one place. Students graduate and remain in the city searching for work or launching businesses. When economic opportunity is centralized, people follow it, even when the system is already overwhelmed. Nairobi’s population density is estimated at more than 6,000 people per square kilometre, compared to a national average of roughly 100 people per square kilometre. The city is between sixty and eighty times more crowded than the country as a whole. Over time, this concentration creates a cascade of pressure. Infrastructure strains under growing demand. Informal settlements expand rapidly. Housing becomes unaffordable. Traffic congestion consumes hours of daily life. And when climate shocks arrive, the system