There have been reports of major destruction yet.
More than 1 million people were evacuated before Fung-wong hit land on Sunday, unleashing fierce howling winds, heavy rain and storm swells on the most populous island of Luzon that left some sleepless through the night.
"We could not sleep because of the winds hitting our metal sheets and tree branches falling," said Romeo Mariano, who sheltered with his grandmother in their home in the province of Isabela.
"When we got out to check our home, we saw the damage."
Early indications suggest the tally of dead "will be minimal," however, civil defence senior official Raffy Alejandro told a media briefing.
A mudslide buried a house to kill two children in the northern town of Kayapa in the province of Nueva Vizcaya, regional civil defence official Alvin Ayson said by telephone.
They followed two deaths from drowning and fallen debris.
Landslides have also isolated at least four towns in the province of Aurora, where Fung-wong made landfall, Alejandro added.
More than 400 flights have been cancelled since Sunday, the civil aviation regulator said.
Forecast to shift northeast to Taiwan, Fung-wong was packing winds on Monday whose speeds had dropped to between 130kmh and 160kmh.
However, it remained a typhoon, whose outer bands could dump rain in coastal areas and trigger storm surges.
The storm is the 21st this year in the Philippines, coming after Typhoon Kalmaegi killed 224 last week, with five dead in Vietnam.
