Heavy rainfall is expected to persist across Nairobi and neighbouring counties over the next several days, increasing the risk of flooding, transport disruptions and landslides in one of Kenya’s most economically active regions.
The advisory, issued by the Kenya Meteorological Department, warns that moderate to heavy rainfall could continue across the Nairobi metropolitan region until at least March 9, with saturated soils significantly raising the likelihood of flash flooding and surface runoff.
The forecast highlights widespread rainfall across Nairobi County and neighbouring counties including Kiambu County, Kajiado County and Machakos County—areas that together form the core of Kenya’s urban economy and logistics network.
Meteorologists say accumulated rainfall and poor drainage conditions could lead to urban flooding in several parts of the capital, potentially affecting mobility, supply chains and commercial activity.
Rainfall Intensifies Across Nairobi
Forecast models indicate that most areas within Nairobi could receive between 20 and 60 millimetres of rainfall over a 24-hour period, with isolated pockets expected to record heavier downpours of up to 80 to 100 millimetres.
Neighbourhoods identified as likely to experience intense rainfall include Kibra, Dagoretti North and South, Embakasi, Makadara, Kamukunji, Roysambu, Westlands, Lang’ata and Mathare.
These areas include both residential neighbourhoods and major commercial zones where businesses rely heavily on road connectivity and uninterrupted power and water supply.
Urban planners have long warned that Nairobi’s rapid expansion, combined with inadequate drainage infrastructure, leaves large sections of the city vulnerable to flooding during intense rainfall events.
In low-lying neighbourhoods with limited stormwater drainage systems, heavy rainfall often leads to water accumulation that can disrupt road access and commercial activity.
Regional Rainfall Expands Across Metropolitan Counties
Outside Nairobi, forecasters expect significant rainfall across counties that form the wider metropolitan economic corridor.
In Kajiado County, scattered to widespread rainfall is expected, with some areas forecast to receive between 40 and 100 millimetres. The heaviest rainfall is expected in Kajiado North, Kajiado West and Kajiado Central.
These areas are closely integrated with Nairobi’s commuter belt, hosting industrial zones, residential developments and transport corridors that connect the capital with southern Kenya and Tanzania.
In Kiambu County, which forms a key agricultural and residential hinterland for Nairobi, rainfall accumulations of between 40 and 80 millimetres are expected in towns such as Gatundu, Thika, Juja, Ruiru, Limuru, Kikuyu, Githunguri and Kabete.
Meteorologists warn that sustained rainfall in hilly parts of the county could increase the risk of mudslides or landslides, particularly on steep slopes where soils have already absorbed large volumes of water.
Meanwhile, parts of Machakos County—including Masinga, Mavoko, Kathiani, Machakos Town, Matungulu, Yatta and Kangundo—are also expected to receive heavy rainfall, with totals reaching between 50 and 80 millimetres in some areas.
These regions include key logistics routes and industrial developments that support manufacturing and distribution activities serving the capital.
Economic and Transport Implications
Heavy rainfall events in the Nairobi metropolitan region often have immediate economic implications due to the area’s role as Kenya’s commercial and financial centre.
Flooding in urban areas can disrupt commuter movement, delay deliveries, interrupt retail activity and temporarily halt construction projects.
Major transport corridors linking Nairobi to surrounding counties may also face congestion or temporary closures during intense storms.
Roads connecting industrial zones, wholesale markets and logistics hubs are particularly vulnerable to flooding where drainage capacity is limited or stormwater systems are blocked.
Businesses operating in flood-prone areas frequently face temporary closures during severe weather events, particularly small retailers and informal traders operating in markets and roadside locations.
In recent years, heavy rainfall episodes have also affected electricity distribution networks and water supply infrastructure, leading to temporary service interruptions in some parts of the metropolitan region.
Rising Flood and Landslide Risks
Meteorologists say one of the key concerns is the cumulative effect of rainfall over several consecutive days.
Because soils across much of the metropolitan region are already saturated, additional rainfall—even at moderate levels—could rapidly generate runoff that overwhelms drainage channels and urban waterways.
This increases the risk of flash floods, especially in low-lying neighbourhoods and areas close to river channels.
Hilly areas in Kiambu and parts of Machakos also face an elevated risk of landslides where steep terrain combines with prolonged rainfall.
Such events can damage roads, disrupt access to residential areas and delay agricultural and logistics operations.
Impact on Agriculture and Water Resources
While heavy rainfall can disrupt urban activity, it also plays an important role in replenishing water reserves and supporting agricultural production in the wider central Kenya region.
Counties surrounding Nairobi supply large volumes of vegetables, dairy products and horticultural produce to urban markets.
Adequate rainfall is therefore critical for crop production, though excessive rainfall can damage crops, erode soil and delay harvesting.
Farmers in parts of Kiambu and Machakos may benefit from improved soil moisture levels, particularly for crops planted during the current rainy season.
However, agricultural extension officers typically caution that prolonged heavy rainfall can also increase the risk of plant diseases and soil erosion.
Public Safety and Infrastructure Concerns
Authorities are urging residents and motorists to exercise caution during the current weather conditions.
Forecasters warn that flooded roads, reduced visibility and slippery surfaces could increase accident risks, particularly during periods of intense rainfall.
Residents living near rivers or in flood-prone areas have been advised to remain alert to rising water levels.
Public health officials also warn that flooding can contaminate water sources, increasing the risk of waterborne diseases if drinking water is not properly treated.
Continued Monitoring
The Kenya Meteorological Department says it will continue monitoring the weather system affecting the region and issue further updates if rainfall intensifies.
Meteorologists note that rainfall patterns during the current season can shift rapidly depending on regional atmospheric conditions, making continued monitoring essential for disaster preparedness and urban planning.
For businesses and residents across Nairobi and neighbouring counties, the current advisory underscores the need to remain alert as heavy rainfall continues across the metropolitan region.
