At least 11 people are feared to be dead in the Caribbean after the massive Category 4 Hurricane Matthew slammed into Haiti and the Dominican Republic Tuesday with winds up to 145 miles an hour and torrential downpours. It’s the strongest storm to hit the Caribbean in nearly a decade. In Haiti, Matthew has killed at least four people and displaced thousands more across a country still recovering from the devastating 2010 earthquake. The storm also knocked out most communications across Haiti and flooded a major bridge connecting southern Haiti to the rest of the country. The United Nations has warned the hurricane poses the greatest humanitarian threat to Haiti since the earthquake six years ago. The hurricane has also hit the Bahamas and Cuba, where the U.S. military evacuated 700 employees, and some family pets, from the naval base at Guantánamo Bay, although it did not evacuate the 61 prisoners held there. The storm is now hurtling toward the U.S. coast. In anticipation, multiple governors have declared states of emergency, and South Carolina Governor Nikki Haley has ordered the evacuation of coastal regions inhabited by more than a million people.