At least 155 people have been killed in landslides and other accidents caused by Typhoon Mangkhut and monsoon rains in the Philippines, officials said Sunday.

Dozens were still missing as authorities probed whether a nearby rock quarry could have played a role in the massive hillside collapse on Thursday.

The new tragedy comes just days after Typhoon Mangkhut pounded the nation's north with heavy winds and rain, sparking a separate landslide that left dozens dead.

Mangkhut swamped farm fields in the nation's agricultural north and smashed houses when it tore through at the weekend with violent winds and heavy rains.

The typhoon smashed homes and flooded key agricultural regions in the northern Philippines before battering Hong Kong and southern China with fierce winds and heavy rain.

The death toll in the Philippines, where the main island of Luzon was mauled with fierce winds and rain, rose to 65 overnight.

A super typhoon made landfall in China's Guangdong Sunday, the country's most populous province, after wreaking havoc in Hong Kong and Macau and killing potentially more than 100 people in the Philippines.

Qatar Red Crescent Society (QRCS) Saturday said it immediately responded to Typhoon Mangkhut, a category 5 tropical storm that hit the Philippines this weekend.

Philippine authorities evacuated more areas on Friday and warned an estimated 5.2 million people in the path of a powerful typhoon to stay indoors, as the country braced for heavy rain and damage to infrastructure and crops.

More than 500 students from 17 schools in Qatar took part in the fourth Annual Open Day for Project-based Learning last week, which aims to provide a platform of knowledge sharing and exchanges.