Kenya Property Owners Warned to Prepare Buildings Ahead of El Niño Rains

Kenya’s property owners and managers have been urged to inspect and strengthen buildings ahead of anticipated El Niño rains, with surveyors warning of increased risks to drainage systems, basements, retaining walls and roofs.

The Institution of Surveyors of Kenya (ISK) has called for early inspections and maintenance to identify structural and drainage problems before heavy rainfall causes damage. It said preparedness should focus not only on protecting buildings but also on the safety of occupants and the continuity of essential services.

“Early maintenance, clear communication and timely response can reduce avoidable damage, protect occupants and help maintain the continuity of essential building services during periods of heavy rainfall,” the surveyors said.

Basements have been identified as a particular risk. Property owners have been advised to inspect waterproofing and drainage systems and consider installing sump pumps, which remove water from building foundations and help prevent flooding.

ISK has also recommended restricting access to underground parking in areas known to be prone to flooding during periods of intense rainfall. Although the measure may inconvenience motorists, it could reduce the risk of damage and safety incidents.

Property owners and managers have also been advised to clear drains, culverts and stormwater channels of debris. Gutters and downpipes should be inspected, while damaged roof outlets should be repaired before rainfall increases.

Retaining walls, foundations and slopes should also be checked for signs of erosion or instability. Waterlogging can weaken these structures and increase the risk of damage.

The advice follows forecasts from the World Meteorological Organization, which has put the likelihood of El Niño conditions at nearly 100 per cent. The Kenya Meteorological Service Authority has also forecast above-average rainfall across much of the country during the October-to-December period.

ISK expects rainfall to increase from mid-October, although the intensity is likely to vary between regions. Nairobi and other urban centres could face significant flooding, particularly in areas where drainage infrastructure is inadequate. Residential estates could also suffer prolonged water damage if preventive measures are not taken.

The flooding of Syokimau’s 360 Degrees Estate earlier this year highlighted the risks faced by developments that are not adequately prepared for heavy rainfall.