World leaders, including Egyptian President Abdel Fattah El Sisi and Jordan's King Abdullah II bin Al Hussein, also expressed their sympathies
Hong Kong raised its highest No. 10 typhoon signal at mid-morning as ferocious winds uprooted trees and smashed windows in office and residential buildings, some of which swayed in the gusts, residents said.
"It swayed for quite a long time, at least two hours. It made me feel so dizzy," said Elaine Wong, who lives in a high-rise tower in Kowloon.
Water levels surged 3.5 m (12 ft) in some places, waves swamped roads and washed up live fish, washing into some residential blocks and a mall in an eastern district.
"It's the worst I've seen," resident Martin Wong told Reuters. "I've not seen the roads flood like this, (and) the windows shake like this, before."
Philippine authorities said a baby and a toddler were among the 29 dead, most of them in landslides in mountainous areas that left at least 13 missing.
"The landslides happened as some residents returned to their homes after the typhoon," disaster response coordinator Francis Tolentino told DZMM Radio, adding that most of the 5.7 million people affected had made advance preparations.
"It was not so severe as we expected it to be because earlier it was noted it would also be strong," said President Rodrigo Duterte, following an aerial survey of some affected areas.
In Macau, which halted casino gambling late on Saturday and put China's People's Liberation Army on standby for disaster relief help, some streets were flooded.
"The suspension is for the safety of casino employees, visitors to the city, and residents," said authorities in the world's largest gambling hub, who faced criticism last year after a typhoon that killed nine and caused severe damage.
China has ordered thousands of boats to return to harbour, and evacuated thousands of offshore oil platform workers, the state news agency, Xinhua, said.
The typhoon, dubbed the 'King of Storms' by Chinese media, is expected to make landfall in Guangdong between the cities of Taishan and Yangjiang as early as 5pm, weather officials say.
Ports, oil refineries and industrial plants in the area have been shut. Power to some areas could also be reduced as a precaution, say grid operators.
Mangkhut's northwesterly track will bring heavy rain and winds to the autonomous region of Guangxi early on Monday, before it weakens into a tropical depression to reach southwestern Yunnan next day.
World leaders, including Egyptian President Abdel Fattah El Sisi and Jordan's King Abdullah II bin Al Hussein, also expressed their sympathies
New measures to be in place until Israel allows uninterrupted flow of humanitarian aid to Gaza, said Turkey's trade ministry
With hundreds of arrests made at other universities, students from Mexico's largest university camped out in solidarity
He turned professional with the club in 2021 and quickly became a popular figure within the squad
Bringing your kids to the park? Take note that children younger than 12 years old can enter for free
Dusty conditions could be expected in some coastal and inland areas as light to moderate winds could turn brisk at times
'I'm always in a better mood to work when it's remote,' a Dubai resident said adding that she does not have to worry about the hassle of being late to work
Vehicles that were submerged in the basement parking of the buildings were still being pulled out this week by the vehicle owners