The most powerful typhoon of the season is closing in on the northern Philippines, where officials ordered precautionary evacuations and closures of schools and offices and urged farmers to quickly harvest their crops to reduce damage.

Forecasters said Typhoon Mangkhut, considered as the strongest this year, could hit northern Cagayan province on Saturday. It was located about 800 kilometers (500 miles) away in the Pacific with sustained winds of 265 kilometers (165 miles) per hour and gusts of up to 325 kph (201 mph). It could maintain the strength of a super typhoon when it hits land in the northeastern corner of Luzon Island.

On Guam, residents woke up Tuesday to flooded streets, downed trees and widespread power outages after Mangkhut passed through overnight.

The Pacific Daily News reported government agencies were conducting damage assessments and beginning to clear roads. About 80 percent of the U.S. territory was without power but it was restored by Thursday morning.

Heavy to intense rains

With a massive rain band 900 kilometers (560 miles) wide, combined with seasonal monsoon rains, the storm could bring heavy to intense rains that could set off landslides and flash floods, Philippine state forecaster Meno Mendoza said.