A typhoon has swelled rivers and flooded low-lying areas as it passed over the storm-battered north-eastern Philippines, where rescuers are helping people flee the rising water.
Rescue officials said at least three people had been killed - two in Camarines Norte province and another in the town of Tanay in Rizal province.
Typhoon Vamco passed north of Manila between Bulacan and Pampanga provinces, toppling trees and knocking out power. Officials said earlier that nearly 200,000 people had been evacuated, some forcibly, from vulnerable coastal and low-lying areas.
Officials said about 1.9 million households were without power in the Manila region and nearby provinces. Many electricity poles were toppled, power lines were knocked down and transformers were damaged.
President Rodrigo Duterte took a break from an online summit of south-east Asian leaders to fly by helicopter over the affected areas.
"As president I guarantee you that your government will do its best to provide assistance in the form of shelters, relief goods, financial aid and post-disaster counselling. Rest assured, the government will not leave anybody behind. We will get through this crisis," he said in a televised address.
Rescue teams were deployed to flooded areas in Rizal province, coastguard chief Admiral George Ursabia told DZBB radio.
Marikina city mayor Marcie Teodoro said fierce winds knocked down power lines overnight, leaving many areas without power and internet service.
Heavy rain also flooded many areas and the Marikina River was swollen. Many people in Marikina city were waiting to be rescued from roofs.
"There are many areas that historically don't get flooded but now they are swamped, like city hall," he told DZBB radio.
Mark Timbal, spokesman for the government's disaster response agency, said 363 rescue teams had been deployed consisting of 1,000 rescuers with at least 40 rubber boats.
The typhoon had maximum sustained winds of 80mph with stronger gusts on Thursday morning, and was heading for the South China Sea.
The government's main disaster response agency asked the media to relay typhoon alerts in north-eastern areas devastated by an earlier typhoon, Goni, saying the agency's messages could not be sent by mobile phones due to damaged telecommunications systems.
Goni, one of the strongest typhoons in the world this year, left more than 30 people dead or missing and damaged or destroyed more than 270,000 houses, many in coastal villages. Tens of thousands of people remain displaced.
The Philippines is hit by about 20 typhoons and tropical storms each year. It is on the Pacific "Ring of Fire", where earthquakes and volcanic eruptions are common, making it one of the world's most disaster-prone countries.
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