The earthquake compounds problems facing the impoverished nation,
which is already reeling from a political crisis following the assassination of their president Moïse.
Landslide population exposure is now estimated to be significant. This means a lot more people are at risk from landslides than we initially thought. Road obstructions are also likely, and now estimates more fatalities and greater economic losses.
Around 53,000 homes were completely destroyed in the quake, with about 77,000 more damaged.
The US Army is preparing to set up a field hospital in Les Cayes.
The US and British Navy are also each sending ships to help with rescue and recovery efforts.
Doctors are struggling to treat the more than 12,200 people who have been injured. Hundreds are still missing, and presumed trapped under the rubble.
Rescue workers had had to contend with armed gangs who attacked aid convoys.
The UN Office for the Coordination of Humanitarian Affairs said on Tuesday that following negotiations, the gangs had agreed to let aid through.
But a major Port-au-Prince hospital closed for two days after two doctors were kidnapped by criminals. A pregnant mother and her baby died while waiting for one of the captured doctors, who was meant to be on his way to perform an emergency Caesarean delivery.
Haiti has been hit by a series of natural disasters in the past, including Hurricane Matthew in 2016.
The deadliest was the 2010 earthquake which killed more than 200,000 people and caused extensive damage to the country’s infrastructure and economy.