In January, the UN agency warned Africa was facing the worst locust plague in 25 years
The situation is also dire in Ethiopia, where swarms are breeding and hatching in the Somali, Oromiya, SNNPR and Rift Valley regions.
The locusts are likely to push northwards in search of food, as well as from Somalia and Kenya.
Breeding swarms have also been seen in the northeast of Somalia where “new immature swarms” are expected to form in about one week.
Uganda and Sudan have also been affected, with swarms entering from Kenya and forming near the border.
A small group of mature locusts has also arrived in the Democratic Republic of the Congo (DRC), appearing on the westerns shore of Lake Albert on February 21.