Islands in the Caribbean are preparing for the arrival of Hurricane Irma, a Category 3 storm. San Juan, Puerto Rico—Islands at the eastern end of the Caribbean Sea made preparations Sunday for approaching Hurricane Irma, which could threaten the area Tuesday. Hurricane watches were posted for Antigua and Barbuda, Anguilla, Monserrat, St. Kitts and Nevis, St. Martin, Guadeloupe and the British Virgin Islands. The U.S. National Hurricane Center said the center of the storm could near that region late Tuesday. It said islands farther north, including the U.S. Virgin Islands and Puerto Rico, should monitor the progress of the storm. Antigua’s prime minister, Gaston Browne, urged people to take preventive measures in case the storm should hit, including cleaning drains and removing objects that could be sent airborne by high winds. Workers began pruning trees and shrubs to reduce chances for branches to tear down power and phone lines. […]