Typhoon Olga halts aid to 600,000MANILA. The Philippines (UPIj — may last five more day s. were reminis* Rislii| floodaaters wished out bridges cent ct the 39:2 flood disaster that also between Manilla and The Philippines' pul central Lu/oo underwater, devastated central plains today, restric- President Ferdinand £. Marcos has ting the flow of relief goods to upwards of €00,000 flood victims.America a and Filipino helicopters plucked hundreds of refugees from rooftops and treetcps w here they had been m a roooed by w a ter s that rea ched depths of 21 feet bsome areas.Officials said the week-long floods, spawned by Typhoon Olga. have destroyed a dam. 10 dies, 20 bridges and submerged 02 towns and cities.MacArthur Highway, the main Philippine road linking Manila Io the northern half erf the country* was reported cut due to swirling floodwaters that washed a way several bridges along the route.The toll stood at II? dead, most of them drowning victims, and at least 12 others were missing. Otficials said more lhan6CC.OCO persons needed relief aid.Acting on an urgent appeal from Philippine authorities, the U.S. government fielded Air Force and Navy helicopters from the two major American military bases in the Philippines to assist FiZipho Air Force and civilian helicopters.Although Typhoon Olga had moved into the South Chin a Sea north of the Philippines, its tail winds w hipped up the southwest monsoco. dumping more rain in the Manila area and in the badly-hit central tuxoa region.A heavy overnight downpour again flooded most streets in the Manila area early today* snarling traffic in downtown areas and in approaches to the city from the southern suburban towns.In the mountain resort of Baguio, I2ti miles north of Manila, rains set loose landslides that stranded vehicles for miles.The floods, which authorities forecastput the entire blind of Lazon. including Manila, under a state of calamity. Half of the nation's 12 miflk* people live on the bland.