Acute malnutrition is surging in areas controlled by the Government of Yemen (GoY), with the West Coast reaching "extremely critical" levels for the first time, the Integrated Food Security Phase Classification (IPC) in Yemen said on Monday. After nine years of war, Yemen remains one of the world's most severe and protracted humanitarian crises, with an estimated 18.2 million people - more than half the population - in need of assistance and protection.