Drivers have been advised to use alternative routes.
Hundreds of vehicles got stuck in a never-seen-before traffic jam on either sides after the road was de-linked near Karima Secondary School.
The waters, eye witnesses have said, dug a deep gully on the said section, making it extremely risky to cross the ditch.
Early this week, the Metrological Department alias weatherman had predicted that Western, Nyanza, Rift Valley, Northern, Southeastern, Coast, Central and Nairobi will receive a substantial amount of rainfall.
The agency said the rainfall will hit a high of more than 40mm within 24 hours in Nairobi, Western, Central, South and Central Rift Valley, and warned of massive flooding.
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