The United Nations says, the whole of drought and conflict-wracked southern Somalia is heading into famine as the Horn of Africa food crisis deepens. In a report for countries sending aid, the UN's umbrella humanitarian agency OCHA said the crisis in southern Somalia is expected to continue to worsen through 2011, with all areas of the south slipping into famine.Appealing for a further 1.4 billion US Dollars to provide life-saving assistance to more than 12 million people across the four countries of the Horn, OCHA said the overall emergency was likely to continue growing for at least three to four months. The UN declared a famine in two regions of southern Somalia on July 20, 3.7 million people are hungry in the region and thousands of Somalis have flooded into northern Kenya.