When Nation.Africa visited the estate on Thursday, several houses were flooded while some were filled with raw sewage carried from the overflowing Ngong River.
With the unprecedented amount of rainfall last night and even more on Thursday afternoon, the river, whose depth is usually just a few feet, is now swollen and appears filled to the brim.
The situation has forced many like Rev Njoya to carry whatever they could from the ground floors of their homes and take cover in the upper rooms.
As many Kenyans celebrate the start of the rainy season after a prolonged dry spell in the country, residents of Zambia estate in Ngong, Kajiado County, are in tears.
When the first raindrops began hitting their roofs at about 11pm Wednesday night, most residents paid little attention. But just hours later, calm was replaced by deep concern after one resident, retired Reverend Timothy Njoya, alerted the local residents association WhatsApp group of the havoc in his home.