Matthew, currently a category 4 hurricane, has already impacted Haiti, a country still recovering from a devastating earthquake on 2010; as well as the Dominican Republic and Jamaica. According to the BBC, authorities in these countries warned people to be prepared for this very powerful hurricane. Other countries that will feel the impact of the Hurricane include: Cuba and the United States. More information on this topic is available here.
CNN reported that there are already three victims and missing people. Matthew is now moving towards Cuba and might affect the provinces of Guantanamo, Santiago de Cuba, Holguin, Granma and Las Tunas. The Cuban government has taken measures to be prepared as it expects the hurricane to landfall in the following hours. More details from CNN regarding Matthew are available here.