"The restoration of some roads, which had previously been blocked, is now allowing some individuals affected by the floods to leave the areas hit by Storm Daniel in search of safety, shelter and basic necessities," IOM added.
At least 6,000 people were killed and thousands of others remain missing due to the weekend floods in eastern Libya, according to latest official numbers.
On Monday, the International Federation of Red Cross and Red Crescent put the figure of missing people at 10,000.