This is the dramatic moment a roof was blown off a building as Typhoon Ragasa battered southern China.

Footage shows polycarbonate sheets flipping off the second floor of the house in Guangdong province on Wednesday, September 24.

A man can be heard gasping in shock as a loud bang echoes through the area, while violent winds send nearby trees swaying.

The impact caused the roof panel to shatter as it hit the ground.

The typhoon made landfall along the coast of Hailing Island in Yangjiang city at about 5 p.m. local time, packing maximum sustained winds of up to 144 kph (89 mph).

Authorities ordered schools and businesses closed in at least ten cities as citizens braced for Ragasa's landfall in Guangdong province.

Local media reported that nearly 1.9 million people were relocated across the region amid the storm's onslaught.

In Zhuhai city, huge waves pounded the coastline while powerful winds uprooted trees under the extreme weather conditions.

Super Typhoon Ragasa, described as the strongest storm of the year so far, has wreaked havoc across East Asia after tearing through the northern tip of the Philippines and Hong Kong, killing at least 10 people in the Philippines and displacing thousands. Taiwan has also reported 17 fatalities linked to the storm.

Ragasa first made landfall in the Philippines' remote and impoverished Babuyan Islands at about 3 p.m. local time on Monday. Its arrival compounded weeks of severe flooding caused by an unusually intense monsoon season.

In Hong Kong, authorities grounded more than 700 flights from Tuesday evening as the storm barrelled toward the Chinese coast. Panicked residents also cleared grocery shelves while preparing to hunker down in their homes.