One person died, five hundred others in 100 households were displaced when Entasopia River bursts its banks on Tuesday and submerged a local dispensary.
One woman, who was delivering a child at the dispensary, was however saved by nurses who rushed her to safety.
County Health CECM Esther Somoire and deputy governor, Martin Moshisho flew to the location using a helicopter to offer assistance to the affected families expected to spend the night in open fields.
Entasopia River flows in to Kajiado West constituency from Narok, and the local residents said they were caught by surprise by the raging water.
A senior official of a local group ranch, Joseph Sirai, told KNU the water started rising after 9 am and as at 1 pm, the river had bursts its banks.
“People started gathering their property in Manyattas along the river and moving to higher heights. One person who had attempted to cross the water was carried away but managed to climb a tree that had been surrounded by the water. Minutes later the tree was uprooted by the raging floods and took him away,” said Sirai.
Somoire said nurses at the dispensary took away to safety a woman who had just given birth to a bouncing girl.
“We are grateful to the nurses for saving two lives. We have managed to give out sugar, blankets and maize meal to the affected families,” said Somoire.
The Health CEC member said they left the area soon after water had started subsiding but advised the local people to move to higher heights.
Three people died downstream the river two weeks ago in a landslide that occurred as they took cover from the rains in a cave.