The United Nations Refugee Agency is warning that the migration land route across Africa is even more deadly than the perilous journey across the Mediterranean Sea. Since 2014, over 19,000 people have died trying to cross the Mediterranean en route to Europe. But a top official with the U.N. Refugee Agency told a German newspaper that the land journey to reach the sea is likely twice as deadly. The International Organization for Migration says dehydration, violence, starvation and illness are among the primary causes of death for migrants traveling across Africa.