Damage on Guam was heaviest from the central region to the northern coast, in particular to tourist areas and military bases.[11][2] The Naval Computer and Telecommunications Area Master Station was shut down due to power outages and water damage to the generators.[3] Two US Navy ships, the USS Niagara Falls (AFS-3) and the USS White Plains (AFS-4)—both naval supply ships—went aground due to rough seas and strong winds,[4] and the dry dock at Apra Harbor was washed ashore.[8] Omar destroyed dozens of businesses on the island.[5] High winds knocked a crane into an apartment building[18] and downed 400 wooden and 20 concrete power poles across Tumon,[7] leaving 70% of the island without power.[16] Throughout Guam, Omar disrupted transportation and communication systems, and led to the failure of water pumping systems.[2] Landslides covered roads, and low-lying areas were flooded.[11] About 2,000 homes were destroyed and another 2,200 were damaged to varying degrees,[8] displacing nearly 3,000 people.[2] Destruction was heaviest to wooden structures; buildings made of concrete fared relatively well during the storm.[8] Island-wide, damage totaled $457 million,[2] split nearly evenly between the military bases and civilian damage.[17] One person died on Guam,[8] and more than 200 people required emergency treatment[2]—including about 80 injured by flying debris.[15]