The threat of flooding once again looms over the city of Maiduguri, in north-eastern Nigeria, a year after torrential rains and the collapse of a dam left entire neighbourhoods submerged in water.

For many residents who are still bearing the scars of last year's floods, the possibility of a repeat has created huge unease.

At least 37 people died in the floods and two million had to abandon their houses after the widespread destruction of homes, farms and businesses.

Forty-two-year-old Sa'adatu Dahiru lost her two-year-old son.

"He died as a result of hunger and fever during the flood. We had no proper food, no medicine, and no safe place to stay."