Twenty million people are at risk of starvation this year as delayed rains worsen an already brutal drought in Kenya, Somalia and Ethiopia, the UN warned Tuesday. An extreme months-long drought has left the Horn of Africa on the verge of a humanitarian catastrophe, destroying crops and livestock and forcing huge numbers of people to leave their homes in search of food and water. As long-awaited rains fail to materialise nearly a month into the current rainy season, “the number of hungry people due to drought could spiral from the currently estimated 14 million to 20 million through 2022,” the …