AGANA, GUAM, AUG. 28 -- Typhoon Omar roared across the U.S. territory of Guam in the Pacific today, injuring 59 people, destroying houses and cutting power all over the island.

Disaster officials said among those hurt were six people who suffered strokes when winds of 120 mph to 150 mph hit Guam in the afternoon. Three injured Japanese tourists staying at the plush Reef Hotel were taken to a hospital.

Gov. Joseph F. Ada declared the island of 140,000 people a disaster area this evening. "It is terrible. This Typhoon Omar is giving us a pretty awful beating," he said earlier, as winds whipped around his civil defense command center. More than 2,500 people huddled in typhoon shelters as Omar flattened houses and blew roofs off in the northern towns of Yigo, Dededo, Tamuning and Barrigada.

Ada said it was the worst typhoon to hit Guam since 1976 when Typhoon Pamela flattened most of the houses on the island. Landslides buried roads, low-lying areas were flooded and water supplies were cut.

Omar is now in the Pacific Ocean where it is expected to grow in strength and possibly threaten the northern tip of the Philippines and southern Taiwan later next week, the U.S. Navy Oceanography office said.