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.
Hurricane Melissa was packing sustained winds of up to 282 kph, as the slow-moving Category 5 storm was on course to barrel into Jamaica, in what could be the largest on record for the Caribbean island.
Talks between Afghanistan and Pakistan in Istanbul to broker a long-term truce have ended without a resolution, two sources familiar with the matter said on Tuesday, a blow for peace in the region after deadly clashes this month.
Japanese Prime Minister Sanae Takaichi will nominate US President Donald Trump for the Nobel Peace Prize, White House Press Secretary Caroline Leavitt told reporters on Tuesday, following a signed agreement between the two nations to secure the supply of critical minerals and rare earths.
Two workers were killed and another injured in an explosion at the recently reopened Polymetals Resources-owned Endeavor silver, zinc and lead mine in Australia on Tuesday, forcing the temporary suspension of operations.
United Nations Secretary General Antonio Guterres expressed grave concern about the worsening conflict in Sudan and called for the safe delivery of humanitarian aid on Monday, a UN spokesperson said.