The warning comes as Nigeria is already grappling with severe floods in northeastern Borno state where a dam burst its walls after heavy rains that have also caused floods in Cameroon, Chad, Mali and Niger - all part of Africa's Sahel region that usually receives little rain.

IN response to the devastating floods that have displaced hundreds of thousands of people in Maiduguri, Borno State, Humanity First Nigeria under the

Nigerian farmer Enoch Fater has barely slept in the last few days after water levels started rising at his paddy rice farm and in a major river nearby, pointing to impending floods in Benue state, a major food producer in the central belt.

Flood warnings had been ringing out across Nigeria’s north-east for weeks. Schools in Maiduguri were closed for a fortnight as the torrential rains came. The reservoir of the Alau Dam began to overflow;

STORY: For Alagoa Morris, the trauma of repeated flooding is all too familiar. He says his home and office in southern Nigeria's Bayelsa state gets hit by floods every rainy season.The consequences: property loss and weeks of homelessness for his family.

Floods have displaced 300,000 people and damaged thousands of buildings, affecting one million people in Maiduguri.