NAIROBI: The number of severely food-insecure people across the Greater Horn of Africa has increased to 22.9 million in February as a prolonged drought led to failed harvests. The UN Office for Coordination of Humanitarian Affairs (OCHA) warned that drought in the Horn of Africa is expected to intensify in the coming months, with a delayed start to the rainy season and depressed levels of precipitation forecast for March-May in most of the Horn. “Needs are driven by successive episodes of drought, which have led to consecutively failed harvests, combined with conflict and insecurity, and economic shocks affecting the most vulnerable,” OCHA said in its latest Humanitarian Outlook report released in Nairobi.