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The United Nations today said that it is "very concerned" about the impact  Hurricane Matthew may have in Haiti, a country that still has not recovered from the devastating consequences of the earthquake that struck in 2010.

"We are very concerned about what might happen to large population groups that have not yet recovered from the earthquake,"  said at a news conference Denis McClean, spokesman for the UN agency for disaster prevention (UNISDR).

The spokesman said that more than 60,000 Haitians are still living in tent camps, and hundreds of thousands live in shanties with "extremely precarious" structures.

McClean said that the case of Haiti is "a textbook example of all risk factors together," making the world body even more worried about possible "devastating consequences" in the country.

The powerful category 4, Hurricane Matthew, with maximum sustained winds of 230 km / h made landfall in western Haiti today, and is expected to continue its trajectory towards the island of Cuba.

Breaking News: Matthew makes landfall in Haiti as category 4 hurricane

According to all the studies, Matthew is the most powerful hurricane to have directly impacted Haiti since hurricane Flora in 1963, where an estimated 5.000 people lost their lives.

There are great dangers posed by heavy rainfall that will make its way through southern Haiti, with a cumulative rainfall that could reach 25 inches (63 centimeters), and up to 40 inches (more than one meter) of water in some areas

Severe flooding and mudslides are also expected to further complicate the precarious sewer and water systems, which may exacerbate existing cholera epidemic in the country.