Nairobi County has deployed multi‑agency teams within its six‑borough framework to clear blocked waterways, widen drainage routes and reinforce culverts before the anticipated El Niño downpours.

Governor Johnson Sakaja toured the ongoing projects on 7 October 2026, visiting sites that span the central business district, the Country Bus hub, the Kayole slaughterhouse area, Kangundo Road, Matopeni Spring Valley in Embakasi Central, Garden Estate Road, Oak Place in Ridgeways and sections of Roysambu.

Key interventions include reopening clogged streams, expanding drainage corridors and deepening culverts, with the Ngong River project in Lang’ata highlighted as a completed effort that involved dredging and removal of obstructing walls.

The borough system consolidates Nairobi’s 17 sub‑counties and 85 wards into six zones, each overseen by a manager who reports directly to the governor and senior county officials.

According to the governor, this arrangement provides a comprehensive view of conditions from six senior officials rather than dozens of ward or sub‑county administrators, streamlining coordination across the capital.

The six boroughs cover all sub‑counties: Central (Starehe, Kamukunji, Mathare), Western (Westlands, Dagoretti North, Dagoretti South), Northern (Kasarani, Roysambu, Ruaraka), Southern (Kibra, Lang’ata), Eastern (Embakasi North, West, Central) and South‑Eastern (Embakasi South, East, Makadara).

County officials warned that heavy rains are expected within days, though they have not disclosed a precise arrival date or the remaining scope of unfinished drainage work.