More than 600 people have died in Nigeria the worst flooding the West African nation has seen in a decade.
Some 1.3 million people have been displaced, and more than 200,000 homes have been destroyed.
Flooding is expected to continue until the end of November.
Nigeria is used to seasonal flooding, but this year has been significantly worse than usual.
The government has said unusually heavy rains and climate change are to blame.
The emergency release of excess water from dams both in Nigeria and in neighbouring Cameroon was another key factor causing devastating flooding.
Experts also say poor planning and infrastructure have exacerbated the damage.
