At least 13 bodies have been found in different parts of Nairobi following heavy rains in the city.
Police said 11 of the bodies were recovered in Mathare, one in Kibera and one in Kayor.
People gathered in Mathare were swept into the area after Tuesday night's rains.
Authorities fear the death toll could rise as rescue efforts progress.
Hundreds of people have been evacuated due to flooding caused by rain that hit the city.
This affected major roads and properties, and flash flooding made homes near the river uninhabitable.
Nairobi Police Chief Adamson Bangay said multi-agency emergency teams were combing various locations on search and rescue missions.
He appealed to people living near river banks to move out as Kenya Meteorological Department forecasts indicate increased rainfall in the coming days.
“Our teams are still on the ground assessing the situation, but we continue to encourage people to stay out of the corridor as much as possible,” Bungay said.
Various agencies participate in search and rescue operations.
Floods have killed dozens of people and displaced many others in other parts of the country.
The rain also caused landslides in Narok, Kisii and Limuru, killing at least seven people.
President William Ruto said he had met with leaders of areas severely affected by the floods and agreed to mobilize resources to deal with the threat.
Azimuo La Umoja One Kenya Coalition Party Leader Raila Odinga has called on President William Ruto to declare the ongoing deluge a national disaster.
He also called on President Ruto to deploy a military response force as part of emergency procedures to mitigate the damage caused by the floods.
Raila also wants to set up an emergency fund to help flood victims.
Mr Raila then revealed that MPs from the opposition coalition jointly raised a donation of Sh1 million which would be donated to the Kenya Red Cross Society for this purpose.
“The president and the government should declare the floods a national disaster and immediately activate all emergency mechanisms, including military disaster response teams,” Raila said.
Raila called on Governor Johnson Sakaja to carry out adequate rescue operations in the areas most affected by the floods and provide adequate assistance to all victims.
He also called on governments to take long-term measures to address long-standing threats, saying: “As a country, rather than asking for help when it rains and then asking for help again when it stops raining. We can do good things,” he said.
“While we continue to receive reports from other parts of Nairobi and access to some areas remains highly restricted, we urge the government and other disaster response agencies to ensure that all affected areas “We have launched a search and rescue operation and are appealing for food, blankets and medicine to the affected residents.”
Raila said forecasters were forecasting more rain likely this week, raising concerns that the situation would worsen further.
He called for the worst-case scenario and preparedness as a key step in mitigating a further large-scale crisis.
