The storm, named after a fruit in Thailand, is forecast by the USA military's Joint Typhoon Warning Center to bring top winds of 145 knots (268 kilometers per hour) with maximum gusts of 175 knots. A super typhoon is one with winds of 241 kilometres per hour (150 miles per hour) or greater.
Philippines officials have ordered evacuations and closed schools and offices as Typhoon Mangkhut neared, carrying sustained winds of more than 200km/h (125mph).
A handout photo made available by NASA today shows a satellite image of super typhoon Mangkhut approaching the Philippines yesterday.
Senator Richard Gordon, the chairman of the Philippines Red Cross, said on Wednesday: "We're anxious for the 10 million people in the Philippines living in the path of this destructive storm, including those who have been displaced several times due to the monsoon rains last July and August".
The typhoon is expected to make seasonal monsoon rains in the Philippines even more intense and put a further seven million people at risk. The Pearl River Delta region, which includes Hong Kong and Macau, is among the most densely populated in the world.
The typhoon, named Ompong in the Philippines, will bring heavy rains and storm surges on its trail.
A projection of the storm's path by the Hong Kong Observatory (HKO) said it will pass within 50 miles (80km) of Hong Kong and 100 miles (160km) of Macau on Sunday.
Guangdong is next on Mangkhut's track.
After Philippines, Mangkhut will also affect the Chinese coast in the South China Sea giving heavy rains over these areas as well.