Army troops and police were deployed to rescue residents trapped in flooded villages in the hard-hit provinces of Aurora, where the typhoon blew ashore early today, and Nueva Ecija, a nearby rice-growing province where floodwaters swamped farmlands at harvest time, officials said.
After slamming into Aurora's Casiguran town after last midnight, the typhoon weakened and slowed considerably, hemmed in by the Sierra Madre mountain range and a high pressure area in the country's north and another typhoon far out in the Pacific in the east, government forecaster Gladys Saludes said.
Authorities suspended dozens of flights and sea voyages due to the stormy weather, and many cities canceled classes on Monday.
By today afternoon, the typhoon had veered toward the north from its westward course and was tracked over mountainous Nueva Vizcaya province with sustained winds of 150 kilometers (93 miles) per hour and gusts of up to 185 kph (115 mph), according to the government's weather agency.
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Satellite images show that the typhoon appeared to be losing its eye, a sign of its dissipating strength, acting weather bureau chief Esperanza Cayanan told reporters, adding that Koppu was forecast to move at a slow pace of 5 kph (3 mph) across the north before exiting the main northern island of Luzon on Wednesday.
"There's still danger," Cayanan said. "We shouldn't be complacent."
A teenager was pinned to death today by a fallen tree, which also injured four people and damaged three houses in suburban Quezon city in the Manila metropolis.
A man was electrocuted in northern Tarlac province and two bodies were seen being swept by floodwaters in Nueva Ecija, but authorities were trying to determine whether those were typhoon-related deaths.