Hurricane Florence is packing maximum sustained wind speeds of 120 miles per hour, while Mangkhut is packing maximum sustained winds of 135 miles per hour, according to the Joint Typhoon Warning Center (JTWC) and the NHC.
"The weather here is still good but we're moving them now because it's very important that when it comes, people will be away from peril, " Mr Mamba said.
It's expected to be 179 nautical miles (331.5 kilometers) off Kaohsiung in southern Taiwan on September 15 before heading to Hong Kong, according to the US agency.
The Global Disaster Alert and Coordination System said in total up to 43.3 million people could be affected by the storm in the Philippines and southern China.
The winds of the collossal Pacific typhoon alone pack the pack destructive force of 500,000 Hiroshima bombs.
The typhoon, named Ompong in the Philippines, will bring heavy rains and storm surges on its trail.
Cagayan Gov. Manuel Mamba tells The Associated Press by telephone that evacuations of residents from risky coastal villages and island municipalities north of the province have started and classes in all levels have been canceled.
"I worry especially for houses made of light materials", said Marilou Cayco, governor of Batanes, a chain of seven remote islands 240 km (149 miles) off the mainland where she said up to 3,000 families could be "battered".
The Department of Social Welfare and Development (DSWD) went on red alert on Thursday, September 13, to monitor areas in the path of Typhoon Ompong (Mangkhut) and prepare for disaster response. He has already ordered schools and government offices to close.
Typhoon Mangkhut has already hit Guam resulting in flooding of streets, uprooting of trees as well as widespread power outages.
The strongest typhoon to hit the Philippines this year is threatening the farmlands in Northern Luzon just before the rice and corn harvest.
Mangkhut is forecast to make landfall in the northern Philippines on Sept. 14 or Sept. 15 and then move on towards southern China by Sept. 16.
But Mangkhut's awful power is multiplied by the threat of storm-surges the height of two double decker buses sweeping inland like a tsunami.
An average of 20 typhoons and storms lash the Philippines each year, killing hundreds of people and leaving millions in near-perpetual poverty. About 80 per cent of the United States territory was without power but it was restored by Thursday morning.