Dam Collapses in Luzon; Typhoon Deaths at 100MANILA, The Philippines (UPl) — The death toll in the Philippines’ flood-stricken central Luzon region soared to more than 100 today with new flooding unleashed by the collapse of a major dam.Floods swirled to the west coast of Luzon Tuesday night when the huge Santo Tomos dam burst 70 miles northwest of Manila, inundating at least 10 towns, destroying 400 houses and killing at least eightpersons.The Philippine National Red Cross and theofficial Philippine News Agency said Olga’s death toll had risen to 105 following reports of 39 new fatalties, including the eight deaths fromthe burst dam.Olga, downgraded from typhoon status to a tropical storm, was about 470 miles north of Manila moving northeast with center winds of 47 miles per hour.Military authorities said the floodwaters in Central Luzon rose to an “all time high” as of midnight Tuesday and the government said 76 of the 116 municipalities in Central Luzon were under water, stranding thousands of residents on rooftops and treetops.The U.S. Air Force joined in the massive relief and rescue operation Floods in the Manila area had subsided by morning with a brief break in the weather. But heavy rains in the afternoon again submerged many of the city streets.The week-long rains spawned by Olga have flooded wide areas of the central Luzon plain, home of half of the Philippines’ 42 million population. Floodwaters reached rooftop level in some areas, inundating dozens of cities and wiping out numerous bridges.Official reports said more than 40,000 homes occupied by 250,710 persons have been flooded. The refugees are being housed in schools, churches and municipal halls.The Santa Cruz Dam was the fourth to burst in central Luzon. Earlier Tuesday, the huge Amedo Dike in Pampanga Province, 60 miles north of Manila, collapsed and forced the evacuation of 80,000 persons marooned in the vicinity.President Ferdinand E. Marcos declared the entire island of Luzon — including the metropolitan Manila area — a disaster zone.