Hunger among Yemen’s children has reached an “all time high”, with nearly 2.2 million in need of urgent care, the U.N. children’s agency UNICEF said on Monday. At least 462,000 children suffer from severe acute malnutrition – meaning they are extremely underweight for their height – a drastic increase of almost 200 percent since 2014, UNICEF said. Sa’ada governorate in the country’s northwest has the world’s highest stunting rates among children, affecting eight out of 10 in some areas, the U.N. agency said.