Torrential rains that have triggered flash floods across Kenya have killed 88 people and displaced tens of thousands, the interior ministry said on Tuesday, as heavy downpours continue to pound the country.

The ministry said 21 counties have been affected, with 34,150 people displaced and three reported missing, amid widespread destruction of homes, roads and other critical infrastructure.

Nairobi, the capital, has been the hardest hit, recording 37 deaths, followed by the eastern region with 21, the ministry said.

In affected areas, residents were seen wading through floodwaters carrying their belongings, while others were evacuated in crowded boats after rivers burst their banks.

Authorities said two people were killed in landslides in the Rift Valley region after heavy rains triggered soil movement that buried several homes over the weekend.

The downpours have also disrupted transport networks, submerging bridges and blocking major highways. Floodwaters and silt deposits caused temporary blockages along the Mai Mahiu-Suswa-Narok road, further disrupting travel and the movement of goods.

Officials also warned of worsening humanitarian conditions. In Homa Bay County, community health workers said at least 11 villages have been affected, with 591 households now living in temporary camps.

Verolyn Danga, a community health worker at the Kobala Community Health Unit in Homa Bay, said many residents had been evacuated by boat to safer areas, though access to health services remained difficult.

The Kenya Meteorological Department has forecast continued heavy rainfall, warning of further flash floods and storm-related hazards during the ongoing long rains season.

Climate analysts said the growing frequency and severity of extreme weather events in the region are linked to human-induced climate change.

They urged residents in vulnerable areas to exercise "extreme caution" as emergency response efforts continue.

Government spokesman Isaac Mwaura said a whole-of-government contingency plan has been instituted with the Health Ministry, deploying surveillance teams to affected counties and issuing advisories on flood-related injuries and potential disease outbreaks.