A super typhoon is taking aim at several remote U.S. islands in the Pacific Ocean, lashing Guam with heavy rain and tropical storm-force wind gusts hours before its arrival.

Super Typhoon Sinlaku is on track to barrel over the Northern Mariana Islands late Tuesday local time with widespread rain and flooding along with destructive winds that could cause lengthy power outages, the National Weather Service said.

Guam, a U.S. territory with several American military installations and about 170,000 residents, isn’t expected to take a direct hit but still could see damaging winds.

The tropical typhoon — the strongest on Earth so far this year — was producing sustained winds of 173 mph on Monday as it neared the islands of Rota, Tinian and Saipan, according to the Joint Typhoon Warning Center.

While it’s expected to weaken slightly over the next few days, Sinlaku should cross by the islands as a Category 4 or 5 typhoon.

The typhoon has stayed mostly on a track that puts it going over or just skirting along Tinian and Saipan, said Joshua Schank, a lead meteorologist in Guam for the weather service.

About 50,000 people live on the three islands, with most on Saipan, known for its laid-back resorts, snorkeling and golf as well as the capital of the Northern Mariana Islands.

Saipan was the site of one of World War II’s bloodiest battles in the Pacific, in which more than 50,000 Japanese and American soldiers and local civilians died.

In Guam, where Typhoon Mawar knocked out power for days in 2023, U.S. military officials warned personnel to prepare for the storm and shelter in place. The military controls about one-third of the land on the island, a critical hub for U.S. forces in the Pacific.

The island already was being hit by heavy rains and wind gusts up to 60 mph very early Tuesday, Schank said. Most businesses were closed and residents were told to stay home, he said.

Glen Hunter, who grew up on Saipan, has weathered numerous typhoons. “We sit in what they call ‘Typhoon Alley,'” he said early Tuesday after waking up to strong gusts and seeing downed trees.

For the most part, residents live in sturdy, fully concrete homes and those in substandard wooden houses with tin roofs tend to stay with family or in government shelters, he said.