Officials in Sierra Leone's capital, Freetown, say at least 250 people are dead after a mudslide and heavy flooding.
Relatives dug through the mud in search of their loved ones Monday while military personnel were deployed to help with the rescue operation.
Photos and video posted by local residents showed people chest deep in mud trying to traverse the roads.
The catastrophe in the early hours of Monday followed hours of heavy rains. Witnesses described a particularly-hard hit area in Regent saying roads became "churning rivers of mud."
A technician at a local Hospital mortuary, told state media that a lack of space is forcing workers to leave bodies on the floor.
He said the death toll will likely rise, as many people were sleeping in their homes when the flooding and mudslide happened.
A spokesman for the Red Cross told the French News agency that the group had accounted for at least 312 dead.
Officials estimate several thousand people have been left homeless.
The United Nations says gunmen have attacked a U.N. peacekeeping base in the northern Mali city of Timbuktu, killing seven people.
U.N. officials say the dead include five Malian security guards, a gendarme and a Malian contractor working for the U.N. mission.
They say six assailants were also killed by U.N. peacekeepers during the Monday afternoon attack.
The violence follows another attack on Monday in which armed men opened fire on U.N. peacekeepers and Malian troops in the central Malian town of Douentza. One peacekeeper and one Malian soldier were killed in that attack.
No one has claimed responsibility for Monday's violence, however Islamist militants frequently target the U.N. peacekeeping mission in Mali. More than 100 peacekeepers have been killed in Mali, making it the most deadly of the United Nations' 16 global peacekeeping operations.