BERLIN - The International Organization for Migration urged countries to step up their donations in response to the world's largest displacement crisis in Sudan, warning on Tuesday that inaction could cost tens of thousands of lives.

The IOM has received just 21 percent of the support it needs to provide crucial aid to the Sudanese, already plagued by conflict and now facing hunger, disease and floods, Mohamed Refaat, who leads the IOM's Sudan mission, told a briefing.

READ MORE: Sudan ends consultations with US on peace talks without deal

"The international community is not doing enough," Refaat said.

"Without an immediate massive and coordinated global response, we risk witnessing tens of thousands of preventable deaths in the coming months," he added.

READ MORE: Death toll from heavy rains in Sudan rises to 53

Some one in five people have been displaced in Sudan, with 10.7 million people internally displaced and 2.3 million having fled across borders, according to the IOM.

READ MORE: At least 32 killed, 107 wounded due to heavy rains, floods in Sudan

A conflict in Sudan that erupted in April 2023 has unleashed waves of ethnic violence and created famine-like conditions across the country.