Some 2.6 million people across 23 arid and semi-arid areas are in need of relief food, the government has said.
Of these, 623,000 are children and 69,000 pregnant and lactating mothers, who are at risk of malnutrition as drought ravages the regions.
Turkana is the worst affected, with 250,000 children aged under five in Turkana North, Turkana South and Laisamis sub-counties experiencing acute malnutrition, according to government spokesman Cyrus Oguna.
Another 200,000 in Turkana West and Turkana Central, Baringo, Tana River, Samburu and Moyale are facing critical malnutrition.
“Eight out of the 23 counties are severely affected by drought and require urgent enhanced relief food assistance. They include Garissa, Mandera, Wajir, Marsabit, Tharaka-Nithi, Isiolo, Embu and Kitui,” said Mr Oguna.