MANILA — A powerful typhoon slammed the northern Philippines early Saturday, bringing high winds and torrential rains and evoking memories of Typhoon Haiyan, which ravaged the center of the country in 2013 and killed more than 6,000 people.

Flooding, torn roofs and power outages were reported as Typhoon Mangkhut, which had been the equivalent of a Category 5 hurricane, made landfall on the nation’s largest island, Luzon, at 1:40 a.m. local time. A New York Times reporter in northern Luzon described debris as big as a roof flying past her car.

The maximum sustained wind speed of the typhoon slowed to about 120 miles per hour as it reached Luzon’s shores, the national weather service of the Philippines reported, but the storm maintained its power to destroy, with gusts reaching as high as 200 m.p.h.

By morning, there were no reports of casualties or major damage, but some communities were cut off by power and communication outages. Teams were preparing to visit the worst-hit areas and assess the damage over the next few days.