Marie el-Drese, Secratery General of aid group, told the Associated Press by phone that a further 10,100 are reported missing in the coastal city.
The flooding, fed by two breached dams, swept away entire families on Sunday night and exposed vulnerabilities in the oil-rich country that has been mired in conflict since a 2011 uprising that toppled long-ruling dictator Moammar Gadhafi.
Daniel, an unusually strong Mediterranean storm, caused deadly flooding in towns across eastern Libya, but the worst-hit was Derna. As the storm pounded the coast Sunday night, residents said they heard loud explosions when two dams outside the city collapsed. Floodwaters gushed down Wadi Derna, a valley that cuts through the city, crashing through buildings and washing people out to sea.
A U.N. official said Thursday that most casualties could have been avoided.
“If there would have been a normal operating meteorological service, they could have issued the warnings," World Meteorological Organization head Petteri Taalas told reporters in Geneva. "The emergency management authorities would have been able to carry out the evacuation.”
The WMO said earlier this week that the National Meteorological Center had issued warnings 72 hours before the flooding, notifying all governmental authorities by email and through media.
Officials in eastern Libya warned the public about the coming storm and on Saturday had ordered residents to evacuate areas along the coast, fearing a surge from the sea. But there was no warning about the dams collapsing.
