The Government has unveiled a Sh47.2 billion Flood Resilience Masterplan aimed at tackling chronic flooding across Nairobi.

Prime Cabinet Secretary Musalia Mudavadi presented the plan to Parliament under the Nairobi Rising Programme, describing it as a long-term transformation of the city’s drainage and climate resilience systems.

Core Strategy: “Sponge City” Approach

The plan adopts a Sponge City model that:

• Absorbs stormwater instead of rushing it downstream
• Retains water in green spaces and underground storage
• Reuses water in controlled systems
• Reduces flash flooding in urban areas

This marks a shift from traditional fast drainage, which often transfers flooding to other neighborhoods.

Implementation Phases

Phase 1: Emergency Stabilisation (2026)

Focus on immediate flood risk reduction:

• Rapid rehabilitation of blocked drainage systems
• Flood early warning systems
• Flood risk mapping across the city
• Strengthened emergency response coordination

Commuter Impact

• Faster response during heavy rains
• Reduced sudden road flooding in critical corridors

Phase 2: Structural Resilience (2026–2028)

Major infrastructure rollout:

• Comprehensive drainage solutions across river sub-catchments
• Rehabilitation of Mathare and Ngong river corridors
• Underground flood retention infrastructure
• Integration of green infrastructure (parks, permeable surfaces)

Commuter Impact

• Reduced flooding along major transport routes
• Improved walkability in flood-prone estates

Phase 3: Long-Term Climate Adaptation (2028–2032)

Long-term sustainability measures:

• Expansion of green corridors along rivers
• City-wide resilient infrastructure systems
• Creation of a Climate Resilience Investment Fund

Commuter Impact

• Long-term reduction of seasonal disruptions
• More reliable transport operations during rains

Key Projects Already Underway

Joint national and county initiatives include:

• Large-scale road and drainage upgrades
• Expansion of sewer and sanitation infrastructure
• Flood mitigation in transport developments
• Nairobi River regeneration
• Stormwater drainage expansion
• Improved urban planning and zoning

Enforcement Measures (Major Shift)

Government says the biggest problem has been weak enforcement, not lack of policy.

New enforcement actions:

• Protection of riparian reserves
• Public compliance register for developments
• Mandatory flood risk disclosure
• Implementation of Nairobi Integrated Urban Development Master Plan
• Stronger accountability across agencies

What This Means for Nairobi Residents

• Reduced flooding in low-lying estates
• Improved road accessibility during rains
• Better early warnings for commuters
• Long-term climate-resilient infrastructure
• Stronger crackdown on illegal developments on drainage corridors

Metros Insight

This plan signals a policy shift from reactive drainage clearing to structural flood prevention.
If enforcement holds, Nairobi could see:

• Fewer transport shutdowns
• Reduced property damage
• Safer pedestrian movement
• More reliable public transport during rainy seasons

However, success will depend on:

• Enforcement against encroachment
• Maintenance of drainage systems
• Funding continuity beyond 2032

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