Lokoja - President Goodluck Jonathan on Thursday visited some of the hundreds of thousands of people made homeless by the country's worst flooding in at least five decades, calling it a 'national disaster'.
Vast stretches of Nigeria have been submerged by floods in the past few weeks, as major rivers like the Niger, the continent's third longest, burst their banks.
At least 140 people have been killed, hundreds of thousands uprooted and tens of thousands of hectares of farmland have been submerged since the start of July, raising concerns about food security, the National Emergency Management Agency (NEMA) said.
In Kogi, a northern state that has been the worst affected and which Jonathan visited on Thursday, NEMA state coordinator Ishaya Chonoko said 623 900 people had been displaced and 152 575 hectares of farmland destroyed so far.
"We are very sad over these flood incidences in the country. It is a national disaster," Jonathan said with a sombre expression, after casting an eye over the makeshift displacement camp huddling 738 people together in Dankolo primary school.
"We are thinking of how to settle you all back to your places after the floods. Government is doing everything possible to cushion the effects on you... it will soon be over."
Nigeria usually suffers from seasonal flash floods but almost never on this scale. Floods have also devastated the Niger Delta where the Niger river fans into creeks before emptying itself into the Atlantic.
There has been no reported impact on crude oil production, but a cocoa industry body said last month that cocoa output would fall far short of a 300 000 tonne target for last season.
"I have lost all hope in life, because I lost all that I had," said victim Dan Musa Mosiji, but he added that he was comforted by government reassurances that he could be resettled.
As images have trickled out of stranded villagers perched on rooftops and fuel trucks washed onto their sides, pressure has mounted for the government to act, and it has pledged millions of dollars for relief efforts.
"Our major problem here is that we don't have accommodation for all the victims. They are crammed into this small school," said Red Cross coordinator of the camp, Jubril Ebiloma, as families squeezed together in a classroom behind her.