lost their roofs. The Luis Hospital suffered roof damage and flooding, but remained operational. Geography The U.S. Virgin Islands are in the Atlantic Ocean, about east of Puerto Rico and immediately west of the British Virgin Islands. They share the Virgin Islands archipelago with the Puerto Rican Virgin Islands of Vieques and Culebra (administered by Puerto Rico), and the British Virgin Islands. The territory consists of three main islands: St. Thomas, St. John, and St. Croix, as well as several dozen smaller islands. The main islands have nicknames often used by locals: "Twin City" (St. Croix), "Rock City" (St. Thomas), and "Love City" (St. John). The combined land area of the islands is roughly twice the size of Washington, D.C. but are both similar in terms of their majority black population and political party strength. The U.S. Virgin Islands are known for their white sand beaches, including Magens Bay and Trunk Bay, and deepwater harbors along the Anegada Passage, including Charlotte Amalie (the capital) and Christiansted. Like most Caribbean islands, most of the islands of the Virgin Islands, including St. Thomas and St. John, are volcanic in origin and hilly. The highest point is Crown Mountain on St. Thomas at . St. Croix, the largest of the U.S. Virgin Islands, lies to the south and has a flatter terrain because of its coral origin. The National Park Service manages more than half of St. John, nearly all of Hassel Island, and many acres of coral reef. There are several national park sites, such as the Virgin Islands National Park, Virgin Islands Coral Reef National Monument, Buck Island Reef National Monument, Christiansted National Historic Site, and Salt River Bay National Historical Park and Ecological Preserve. The U.S. Virgin Islands lie on the boundary of the North American plate and the Caribbean Plate. Natural hazards include earthquakes, hurricanes and tsunamis. The U.S. Virgin Islands contain the Leeward Islands moist forests and Leeward Islands xeric scrub terrestrial ecoregions. Climate The United States Virgin Islands experience a tropical climate, with little seasonal change throughout the year. Rainfall is concentrated in the high-sun period (May through October), while in the winter the northeast trade winds prevail. Summer and winter high temperatures differ by or less on average. Politics and government The U.S. Virgin Islands are an organized, unincorporated United States territory. Although those born on the islands are U.S. citizens, U.S. Virgin Islanders residing in