Drying Lake Chad Basin gives rise to crisis.

Twenty-year-old Phoebe Musa remembers the day Boko Haram militants stormed her village of Gwoza in Borno State, northeast Nigeria, five years ago. They came in on horseback, motorbikes and screeching military vehicles and attacked everyone in sight. Amid bursts of gunshots, they set fire to dozens of homesteads.

The fighters then abducted Ms. Musa from her home, blindfolded her and dragged her deep into the nearby Sambisa forest, where she remained until she was rescued by Nigerian troops earlier this year.

'I was forcibly married to three terrorists at separate times that resulted in three children,' Ms. Musa told Africa Renewal during an interview at the Durumi camp for internally displaced persons (IDPs) in Nigeria's capital, Abuja. With her lastborn child strapped on her back, she explained that her two older children had died of starvation in the bush.

Ms. Musa's predicament represents the face of the worsening humanitarian situation in the Lake Chad Basin. About 10 million people living there are in need of humanitarian assistance, according to the UN High Commissioner for Refugees (UNHCR). The UN agency says that thousands of IDPs being sheltered in various camps in the region lack adequate accommodation, food, water and sanitation.

That Lake Chad, once one of Africa's largest freshwater bodies and a source of livelihood for about 30 million, is vanishing fast is no longer breaking news. What is new is the unique and complex humanitarian crisis around the basin, which is among the most severe in the world.

'The widespread violence has left 10.7 million people across the Lake Chad region in need of emergency assistance. Most of these people were already contending with high poverty rates, poor provision of basic services like education and healthcare, and the devastating impact of climate change.

Now 2.3 million people across the region are displaced; over 5 million are struggling to access enough food to survive; and half a million children are suffering from severe acute malnutrition,' said UN Deputy Secretary-General Amina Mohammed during a high-level event on the humanitarian situation in the region.

Located in Northern Central Africa, Lake Chad borders four countries - Chad, Nigeria, Niger and Cameroon. But the Lake Chad 'Basin' that covers almost 8% of the continent, spreads over seven countries: Algeria, Cameroon, Central African Republic, Chad, Libya, Niger and Nigeria.

The water body has diminished by 90% since the 1960s due...