In Nigeria, aid agencies are warning that thousands face starvation, as the number of people at risk of famine has climbed to 1.5 million. This is Gujja, an internally displaced person who says her family was left hungry after fleeing the militant group Boko Haram.

Gujja: “Boko Haram chased us out, and they killed many of our people. When we left, we spent about three days in the bush with hunger and thirst, before we moved to a French-speaking country. They took us by car to a place where we lived without food and shelter. All the basic needs are scarce. We are suffering because of hunger and lack of water. We don’t have anything. Also, food and mats are scarce. About 20 of our people died because of suffering.”

The United Nations warns some 20 million people in South Sudan, Somalia, Yemen and Nigeria are at risk of famine—more than at any time since World War II.