Op-Ed: Why Mogadishu Floods: A City Built for Half a Million, Forced to Carry Three

Mogadishu floods because the city is running on infrastructure designed for a city that no longer exists. The flash flooding that paralyses the capital after every heavy downpour is not, as the public conversation tends to suggest, simply a matter of how much rain falls. It is the predictable output of a hydrological and spatial system that exceeded its carrying capacity more than two decades ago and has not been redesigned since.

Before the collapse of the Somali state in 1991, Mogadishu had a serviceable but modest road network, with most primary corridors built during the second half of the twentieth century. That network was engineered for a resident population of under half a million, roughly one-sixth of today’s footprint, and for a vehicle fleet a fraction of current volumes. The hydraulic assumptions baked into those assets, return periods, runoff coefficients, channel cross-sections, were drawn from rainfall and land-use patterns that no longer apply.

Between 1991 and 2010, capital investment in urban infrastructure effectively stopped. The institutions that would normally commission, supervise and maintain such assets were dismantled, and successive waves of conflict, factional, intra-clan and extremist, steadily degraded the inherited stock of roads, culverts and drainage channels.

Since 2010, the Banadir Regional Administration has driven a sustained reconstruction programme, delivering close to 25 kilometres of paved arterial roads. The effort is real and deserves credit. It is also, by any honest reading, sub-scale against the size of the deficit. The urban form Mogadishu still operates on remains a template designed for a city that no longer exists.

ROOT CAUSES OF SYSTEMIC FAILURE

Why does the capital remain so exposed to drainage failure and the cascading damage that follows? Five interlocking factors account for most of the problem.

First, three decades of armed conflict normalised systematic encroachment on road reserves and drainage easements. Unauthorised structures now sit on land legally reserved for utilities and right-of-way, and the resulting geometry forecloses options the original masterplans assumed would always be available.

Second, Mogadishu has absorbed two decades of rapid demographic growth, driven by improved security and large-scale internal migration from regions affected by conflict, drought, weak labour markets and limited educational opportunity. That influx has placed acute pressure on housing supply, road capacity and traffic volumes. The city’s tax base, technical capacity and regulatory framework have not kept pace, and the legislative and executive instruments needed to manage growth at this speed are either missing or only partially in place.

Third, the absence of a binding city-wide master plan is the single most consequential planning failure. Spatial planning is a shared responsibility between the Federal Government and the Banadir Regional Administration, and meaningful work has been done, including the Mogadishu Drainage Master Plan, a phased seven-year programme costed at roughly one billion United States dollars. The drainage problem will not yield to short-term fixes. It needs a long-horizon investment plan, sustained technical capacity, coherent regulation, durable financing and disciplined coordination across all stakeholders.

Fourth, climate change has emerged as a measurable stressor on the urban system. Recent rainy seasons have produced rainfall and flood events without historical precedent, with significant loss of life and property. The pavement design now in use, both for arterial roads and for the interlocking-block streets at neighbourhood level, concentrates rather than disperses surface runoff, piling additional hydraulic load onto a network that was never built to absorb it. The current asset stock is neither climate-resilient nor environmentally optimised.

Fifth, the absence of structured asset management and routine maintenance is rapidly eroding the value of recently delivered infrastructure. Without a ring-fenced maintenance budget and a defined operations and maintenance protocol, newly built roads enter accelerated deterioration cycles. The Banadir Regional Administration has, to its credit, carried out emergency rehabilitation works after recent flood events, but emergency response is no substitute for a permanent maintenance line in the municipal budget.

A FRAMEWORK FOR DURABLE SOLUTIONS

Given the historical context and the original design intent of the city’s road network, what is needed now is a comprehensive, internationally benchmarked policy framework. The following measures, taken together, make up that framework.

• A statutory Mogadishu Urban Infrastructure Agency, operating under enabling legislation but with operational autonomy, mandated to plan, design, construct, maintain and regulate the capital’s road network, drainage system, traffic management infrastructure and asset quality assurance. Statutory grounding combined with operational independence is essential to insulate technical delivery from short-term political cycles.
 • A binding integrated city master plan governing the spatial relationship between road corridors, drainage networks and the built environment, aligned with international urban planning standards. Such a plan would arrest the city’s unplanned outward expansion, prevent further high-density unregulated construction in flood-exposed zones, and introduce a formal land-use zoning framework that distinguishes residential, commercial, industrial and government-reserved areas.
 • A modern stormwater drainage network, the single most cost-effective intervention available to the city for reducing road damage, traffic disruption and flood-related casualties. New drainage and road assets should be subject to upstream feasibility studies, hydraulic modelling and climate-stress design parameters before procurement begins.
 • Right-of-way recovery and corridor expansion, requiring legislative authority to remove unauthorised structures from road reserves and to restore the carriageway, drainage easement and pedestrian footpath that the original designs allocated. Without enforceable right-of-way recovery, no drainage masterplan can be physically implemented.
 • Lifecycle asset management, with every new corridor commissioned alongside a maintenance plan and a ring-fenced operating budget, so that infrastructure delivers its full design life rather than entering a destructive three-year cycle of build, neglect, collapse and rebuild.
 • Institutional capacity building at the municipal level, anchored in legislative drafting, technical workforce training, partnerships with the Federal Government, the private sector and the donor community, and robust project management, supervision and quality assurance systems.
 • Structured community participation in planning and oversight, particularly to address the dumping of solid waste into drainage channels, the leading cause of localised flood failure during peak rainfall.