The African nation gained independence from Britain in 1961 after more than 150 years of colonial rule and still has many traces of its British past.
On Wednesday, hundreds of Freetown residents queued to identify relatives crushed by the mudslide on Monday.
“Prince Philip and I were deeply saddened to learn of the terrible flooding and landslides in Freetown that have led to the deaths of so many people,” Queen Elizabeth wrote in a message to the president of Sierra Leone.
“Our thoughts and prayers are with all who have lost loved ones and those whose homes and livelihoods have been affected,” she said.
For his part, Kofi Annan, former Secretary-General of the United Nations issued a statement via his social media accounts. He called for all human interventions to help lessen the impact of such natural disasters.
The full statement read: “I join the people of Sierra Leone in mourning their family members, friends and fellow countrymen lost in the recent mudslides.
“The scale of this catastrophe is truly heartbreaking, and continues to require the urgent support of the international community.
“While natural disasters will always be a source of unexpected tragedy, we must acknowledge the role we play in exacerbating extreme environmental conditions.
“Human-driven deforestation is a major cause of not only landslides, but also soil erosion, flooding, loss of biodiversity and global climate change. Without protecting our environment, we cannot hope to reduce the risk of such tragedies from reoccurring.”