Super Typhoon Mangkhut is now located 607miles east of Manila in the Philippines and is moving westward at a speed of 12.6 miles per hour.
The typhoon is expected to boost the intensity of seasonal monsoon rains that have already caused widespread flooding in central Luzon, a mainly farming region north of capital Manila.
Typhoon Mangkhut is expected to bring heavy rains and flooding along the northern coastal provinces of Cagayan and Batanes.
A powerful typhoon is expected to make a landfall in the Philippines' main Luzon island on Saturday (Sept 15), prompting authorities to place 17 areas on alert and start evacuations.
Duterte issued the order during the command conference with weather, disaster, and other government officials at the National Disaster Risk Reduction and Management Council (NDRRMC) operations center in Camp Aguinaldo, Quezon City.
The Pacific Daily News reported government agencies were conducting damage assessments and beginning to clear roads.
He said classes in schools would be suspended on Thursday and offices, except those involved in rescue and relief work, would be advised to close on Friday.
A super typhoon roared toward the Philippines on Thursday, prompting thousands to evacuate ahead of its heavy rains and fierce winds that are set to strike at the weekend before moving on to China.
"I'm stressing that this one is very different".
The storm, which is the strongest to hit the Philippines this year, is also threatening farmlands in Luzon just before the rice and corn harvest.
While the National Hurricane Center (NHC) warned that Hurricane Florence is set to make impact on the coastal areas of North and SC on September 14, Super Typhoon Mangkhut is larger and has an extra day or two before hitting a major body of land, possibly Luzon in the Philippines.
Teams from the International Committee of the Red Cross are on high alert in northern Luzon, the Philippines where the storm is predicted to reach on Saturday morning.
After leaving the Philippines, the fast-moving storm is expected to blow towards southern China on Sunday if it maintains its course, forecasters said.
"My message is clear: disaster is at the doorstep", North Carolina Governor Roy Cooper said on Wednesday, local time. "We are going to evacuate more".
Duke Energy Corp. warned that as many as three million residents, 75 per cent of its total customer base, may lose power in North and SC.