The excessive rainfall has caused rivers and sewers to overflow, turning roads into waterways and destroying homes.
As of Sunday, more than 228 people had died as a result of the floods, with thousands more injured and others displaced from their homes.
This comes as the Kenya Meteorological Department (KMD) warned of heavy rains in many parts of the country in the coming days, as the government stepped up humanitarian operations to minimise the loss of life.
Interior Cabinet Secretary Kithure Kindiki said more than 227,238 people have been affected by flooding across the country since March, when heavy rains linked to El Nio began.
In addition, 72 people remain missing in various incidents across the country and 42,526 households have been displaced, affecting some 212,630 people.
On Friday, President William Ruto warned during his national address that the reopening of schools would be postponed until further notice.
Schools were due to reopen on Monday May 6, after the original date of April 29 was pushed back.
The Ministry of Interior highlighted severe impacts in Marsabit, Tharaka Nithi, Baringo, Kisumu, Nakuru, Machakos, Uasin Gishu, Busia, Laikipia, Nyandarua, Trans Nzoia, Nairobi, Wajir, Mandera, Bomet, Kajiado, Embu and Nyeri counties.
The government on Sunday reiterated the urgency for people living along riverbanks and other waterways to leave immediately to avert disaster.
Logistical support will be provided to facilitate the evacuation of settlements in 33 high-risk counties with 178 vulnerable dams and water reservoirs.
A nationwide assessment identified 192 high-risk dams, with Central (60), Eastern (39), Rift Valley (29), Coast (22), Western (21), Nairobi (12), North Eastern (5), and Nyanza (4), the ministry said.
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