Thirteen people have been confirmed dead and several injured following flash floods in Narok town on Tuesday evening.
It is feared that the toll could rise as rescue operations are ongoing, said county commissioner Arthur Osiya.
Osiya said rescuers are digging through the rubble of a building that collapsed in search of anyone trapped under it.
Administration Police, Kenya Police and the Kenya Red Cross Society are part of the team, he said.
Osiya said the flooding in the town was caused by heavy rainfall in parts including Enabelbel, Olopito and Kisiriri.
He asked residents to report missing people at an information desk set up at Naivas supermarket.
More than 10 vehicles and property worth millions of shillings were destroyed in the 4pm to 8pm downpour.
Vehicles, water tanks and other items were swept away and buildings, market stalls and kiosks partially submerged.
Transport within the town along Narok-Mai Mahiu-Bomet highway was impeded while business owners cleared debris from their premises.
Some said the perennial flooding discourages new investors.
“The county headquarters should be moved to Ewaso Nyiro since Narok town is prone to flooding and is in a pathetic condition as it has no proper drainage system,” said Narok Central Business Association chairman David Sankok.
Sangok noted that Ewaso Nyiro is accessible to all six subcounties, has better facilities and is the gateway to Maasai Mara Game Reserve which is the county’s main source of revenue.
Narok town resident John Kores said little has been done to control the flash floods that have occurred for several years.
The Narok government recently awarded a Sh580 million tender to a Chinese company for the repair of the drainage system but the work is yet to begin.
Kores asked the county to prioritise the rehabilitation of the town’s roads and drainage systems ahead of rainy seasons.