Typhoon Mangkhut's ferocity is being compared to that a Category 5 Atlantic Hurricane.
Super Typhoon Mangkhut, an even more powerful storm than US -bound Hurricane Florence, was heading Wednesday for the Philippines, Taiwan and Hong Kong.
Mangkhut, classified by the Hong Kong Observatory as a super typhoon, is now forecast to pack maximum winds of 250 kilometers (155 miles) per hour by Friday before gradually weakening.
Ompong is the strongest typhoon to hit the Philippines this year, expected to peak at gusts of up to 270 kilometers per hour on Thursday before easing to still unsafe velocities as it approaches land, state weather bureau PAGASA said.
The strong winds generated by Mangkut could cause storm surge and heavy rain could trigger landslides and floods.
"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", Senator Richard Gordon, the chairman of the Philippines Red Cross, said on Wednesday.
However, Wu said that the presence of a high pressure system over the Pacific around Taiwan and the slightly southward tilt of Mangkhut's path, the odds of the typhoon making landfall on Taiwan have been reduced.
In 2016, a super typhoon lashed the southern section of Cagayan, destroying tens of thousands of houses.
After leaving the Philippines, the fast-moving storm is expected to blow toward Hong Kong and southern China on Sunday if it maintains its course, forecasters said.
Office of Civil Defense chief Ricardo Jalad said other northern provinces will also start evacuating residents from low-lying areas on Thursday.
A missile test aboard a navy ship to be attended by President Rodrigo Duterte off northern Bataan province was canceled due to the approaching typhoon.
The current track of Mangkhut is that the typhoon is likely to brush northern Luzon, a less populated part of the largest island in the Philippines, which is home to the capital, Manila.
The country's deadliest on record is Super Typhoon Haiyan, which left more than 7,350 people dead or missing across the central Philippines in November 2013.