There are fears that as many as 20,000 people may have died in the catastrophic floods which hit the eastern region of Libya on Sunday.
The mayor of the devastated port city of Derna said the figure was based on the number of districts completely destroyed when two dams burst, releasing a tsunami of water as people slept.
More than 5,300 people have so far been confirmed dead and about 30,000 others displaced by the raging floods.
Relief workers from the medical charity, Médecins Sans Frontières, are expected to arrive in the city today (Thursday), joining emergency teams.
Many bodies remain unrecovered under the rubble or in the sea, with rescue workers appealing for more body bags.
Thousands remain missing as rescuers struggle to get to Derna.