Plan International Kenya, through its Kisumu Program Unit, carried out an assessment in the affected areas.
The flooding occurred in Kogallo and Obiayo villages, Ombei location on 17 November.
Two rescue centres have been set up at Kogallo hall and Obiayo Primary School. Some 300 families are camping at the rescue centres.
The key gaps include the need for food, beddings, basic hygiene items and sanitation facilities.
During assessment at Kogallo hall, most families had not had a basic meal and children were weary with visible mosquito bites/rashes.
Affected population includes 84 children under 5 years, 83 children aged between 6-10 years, 75 adolescents, 21 elderly persons, 6 pregnant women, 13 lactating mothers and 18 persons with disabilities.
Plan International Kenya has made available blankets, mobile toilets, jerry-cans, plastic sheets and mats to each of its programme units for distribution in case of an emergency as more interventions are put into place.
During the assessment, it was noted that sanitation facilities in the area were destroyed. At the Kogallo hall, one latrine had cracks on the floor.
At Obiayo Primary School, there are 266 displaced persons.
Plan International Kenya is part of the multi-sectoral agencies that are currently involved in El Nino interventions and continues to conduct assessments in the affected areas.