Devastating flooding – the worst in a decade – has affected millions of people in west and central Africa, the UN refugee agency, UNHCR, warned on Friday.

It’s appealed to all donors to step up their support for the most vulnerable, from Burkina Faso to Nigeria, where fields, farms and roads have been flooded.

With the latest, here’s UNHCR’s Olga Sarrado, speaking to UN News’s Daniel Johnson.