In Hong Kong, workers cleared fallen trees and other storm damage.
Days before the typhoon hit land, authorities urged residents in the direct path of the typhoon to evacuate especially those living in coastal communities warning the storm could bring intense rains that could trigger flash floods, landslides and waves as tall as two to three storey buildings.
Tens of thousands of people had travel plans disrupted after Hong Kong's worldwide airport, a major regional hub, canceled most flights.
Philippine officials were assessing damage and checking on possible casualties as Typhoon Mangkhut on Saturday pummeled the northern breadbasket with ferocious wind and rain that set off landslides, damaged an airport terminal and ripped off tin roofs.
The gambling enclave of Macau closed casinos for the first time and the Hong Kong Observatory warned people to stay away from the Victoria Harbour landmark, where storm surges battered the sandbag-reinforced waterfront.
The storm shattered glass windows on commercial skyscrapers in Hong Kong, sending sheets of paper pouring out of the buildings, fluttering and spiraling as they headed for the debris-strewn ground, according to videos on social media. At least 40 people are believed to among the missing and presumed dead.
The skyline of the business district is silhouetted at sunset as typhoon Mangkhut is approaching Hong Kong Saturday.
Boats were thrown onto the shore by powerful waves and the huge rainfall has brought fears of landslides, although none have yet been reported in Hong Kong.
The Thai Meteorological Department says that Mangkhut will weaken into a tropical storm as it moves into north Vietnam and will cause heavy rains and potentially high winds in northern and northern-eastern Thai provinces.
Three people have already died as one of the strongest typhoons in the history of the Philippines makes landfall. At least seven bodies had been dug out Sunday before the work had ceased during the night.
More than 4 million people live in areas at most risk from the storm, which the Joint Typhoon Warning Center in Hawaii categorized as a super typhoon with powerful winds and gusts equivalent to a category 5 Atlantic hurricane. At least 64 deaths were reported in the Philippines and two more in China as of Sunday.