A strong typhoon that barrelled through the central Philippines left at least 28 dead and 12 missing, and forced thousands to flee their homes, devastating Christmas celebrations in the predominantly Roman Catholic country.

Typhoon Phanfone stranded many people in sea and airports at the peak of holiday travel, set off landslides, engulfed low-lying villages with floods, destroyed houses, downed trees and electrical posts and knocked out power in entire provinces. One disaster response officer described the battered coastal town of Batad in Iloilo province as a "ghost town" on Christmas Day.

"You can't see anybody because there was a total blackout, you can't hear anything. The town looked like a ghost town," Cindy Ferrer of the regional Office of the Civil Defence said by phone.

The storm weakened slightly on Thursday as it blew into the South China Sea with sustained winds of 120 kilometres per hour and gusts of 150 km/h after lashing island after island with fierce winds and pounding rain on Christmas Day, the weather agency said.

Most of the deaths reported by officials were due to drowning, falling trees and accidental electrocution.

John Babcock, a spokesperson for Global Affairs Canada, said Thursday that it did not believe any Canadian citizens had died due to Typhoon Phanfone.

"Canada stands ready to provide any assistance necessary," Babcock said in a statement to CBC News.

A father, his three children and another relative were among those missing in hard-hit Iloilo province after a swollen river inundated their shanty, officials said.

The typhoon slammed into Eastern Samar province on Christmas Eve and then barrelled across the archipelago's central region on Christmas, slamming into seven coastal towns and island provinces without losing power, government forecasters said.

Provincial officials, army troops, police and volunteers spent Christmas away from home to tend to thousands of displaced residents in town gymnasiums and schools turned into emergency shelters.

More than 25,000 people were stranded in sea ports across the central region and outlying provinces after the coast guard prohibited ferries and cargo ships from venturing into dangerously choppy waters. Dozens of domestic flights to and from the region were cancelled.

About 20 typhoons and storms batter the Philippines each year. The Southeast Asian nation is also located in the Pacific "Ring of Fire," where earthquakes and volcanic eruptions often occur, making the country of more than 100 million people one of the world's most disaster prone.