At least 11,300 people have died and another 10,100 are missing from the coastal city of Derna one week after Storm Daniel hit northeastern Libya, the UN Office for the Coordination of Humanitarian Affairs reported.
An estimated 170 people have been killed as a result of the flooding elsewhere in the country, and more than 40,000 people have been displaced, the UN report said, citing the latest data from International Organisaton for Migration.
Figures are expected to rise as search-and-rescue efforts continue to look for survivors.
Libya's official news agency reported that floods completely destroyed at least 891 buildings in Derna, according to figures from a team assigned by the Libyan National Unity Government.
An additional 211 buildings were partially damaged and 398 others were submerged in mud, the report added, leaving a total of a quarter buildings damaged in the flood-ravaged city.
Twenty people who were aboard a Singapore Airlines flight that hit severe turbulence and diverted to Bangkok for an emergency landing on Tuesday remain in intensive care. Others are being treated for spinal cord and brain injuries.
A two-storey restaurant building collapsed on the beach in Palma de Mallorca killing at least four people and injuring 16 people in the tourism hot spot in Spain's Balearic Islands.
Israeli forces killed 35 Palestinians in aerial and ground bombardments across the Gaza Strip on Thursday and battled in close combat with Hamas in areas of the southern city of Rafah, health officials and Hamas media said.
Iran's late President Ebrahim Raisi is set to be buried in the holy city of Mashhad on Thursday evening, four days after he was killed in a helicopter crash along with foreign minister Hossein Amirabdollahian and six other people.