OITA, Japan: One of Japan’s strongest typhoons in decades dumped torrential rain across southern regions on Thursday, leaving at least five people dead and injuring dozens, local media reported, as authorities warned millions to seek higher ground due to possible flooding and landslides.

Typhoon Shanshan packed gusts of up to 252 kilometers (157 miles) per hour as it smashed into Japan’s main southern island of Kyushu early Thursday, making it the most powerful storm this year and one of the strongest at landfall since 1960.

The storm then weakened, with maximum gusts of 162 kph at 5:00 p.m. (0800 GMT), the weather office said, but it was still dumping heavy rain across Kyushu and beyond as it moved slowly toward the main island of Honshu.

Five people have been found dead in the storm, Jiji Press reported, including a man whose two-story home collapsed in Tokushima Prefecture.

The storm ripped through downtown Miyazaki city on Kyushu, knocking down trees, throwing cars to the side in parking lots and shattering windows of some buildings. The prefectural disaster management task force said about 50 buildings were damaged.  Miyazaki was littered with debris from nearly 200 damaged buildings.

NHK public television showed a swollen river in the popular hot spring town of Yufu in Oita prefecture, just north of Miyazaki, with muddy water splashing against a bridge.

More than 80 people were injured across Kyushu, mostly in Miyazaki and Kagoshima. Some were injured by being thrown to the ground by the storm on their way to shelters, the Fire and Disaster Management Agency said.

About 168,000 households were without power across Kyushu, most of them in Kagoshima prefecture, Kyushu Electric Power Co. said.

About 20,000 people took shelter at municipal community centers, school gymnasiums and other facilities across Kyushu, according to prefectural reports.

Ahead of the storm’s arrival, heavy rain triggered a landslide that buried a house in the central city of Gamagori, killing three residents and injuring two others, the city’s disaster management department said.

On the southern island of Amami, which Shanshan passed, one person was injured by being knocked down by a wind gust while riding a motorcycle, the fire agency said.

Weather and government officials are concerned about extensive damage as the storm slowly sweeps up the Japanese archipelago to the northeast over the next few days, threatening more floods and landslides.

In the Tokyo region, Shinkansen bullet trains connecting Tokyo and Osaka were suspended starting Thursday evening due to heavy rain in the central region. Bullet train service also was to be suspended in parts of the western and central regions on Friday.

Disaster Management Minister Yoshifumi Matsumura said Shanshan could cause “unprecedented” levels of violent winds, high waves, storm surges and heavy rain. At a task force meeting on Wednesday, he urged people, especially older adults, not to hesitate and take shelter whenever there is any safety concern.

Hundreds of domestic flights connecting southwestern cities and islands were canceled Thursday, and bullet trains and some local train services were suspended.

As the storm headed northeast, similar steps were taken in parts of the main island of Honshu that were experiencing heavy rain. Postal and delivery services were suspended in the Kyushu region, and supermarkets and other stores planned to close.

The Japan Meteorological Agency (JMA) warned that “the risk of a disaster due to heavy rain can rapidly escalate in western Japan as Friday approaches.”

Authorities issued their highest alert in several areas of the country, with more than five million people advised to evacuate, although it was unclear how many did.

Kunisaki city in the Oita region of Kyushu warned inhabitants to “evacuate to a safe place or higher place such as the second floor of your house” because of the risk of flooding.

Rains turned rivers into raging torrents while winds smashed windows and blew tiles off roofs. TV images showed flooded roads and power lines being repaired.

Some parts of Miyazaki prefecture saw record rains for August, with the town of Mizato recording a staggering 791.5 millimeters (31 inches) in 48 hours, the JMA said.

Worried student Aoi Nishimoto, 18, said he had called his family in Miyazaki to see if they were safe.

“Our home is fine, but there was a tornado in Miyazaki and power went out in some places,” he told AFP in Kyushu’s main city of Fukuoka.

“This year, I am away from my parents’ home for the first time. So it’s a bit scary being all alone,” fellow student Rio Ohtsuru, 19, told AFP.

“Maybe I will look for a flashlight in case of a power outage,” she said.

Kyushu’s utility operator said 187,010 houses were without power elsewhere on the island.

Shanshan comes in the wake of Typhoon Ampil, which dumped heavy rain that disrupted hundreds of flights and trains this month but caused only minor injuries and damage.

Typhoons in the region have been forming closer to coastlines, intensifying more rapidly and lasting longer over land due to climate change, according to a study released last month.

Another released by World Weather Attribution (WWA) on Thursday said that climate change turbocharged Typhoon Gaemi, which killed dozens of people across the Philippines, Taiwan and China this year.

In the city of Usa, retiree Fukashi Oishi looked forlornly at an old tree opposite his house that was already mature when he was a child but had snapped and fallen on the road.

“Oh, it’s so sad,” he told AFP.

Auto giant Toyota suspended production at all 14 of its factories in Japan.

Nissan and Honda also halted operations at their Kyushu plants, as did chipmakers including Tokyo Electron, reports said.

Kyushu is a hub for the semiconductor industry, with chip giant Taiwan Semiconductor Manufacturing Company opening a plant there in February.

Japan Airlines and ANA canceled more than 1,000 domestic flights and four international flights for Thursday and Friday, affecting more than 44,000 passengers.

Rail operators suspended most Shinkansen bullet trains between Kyushu’s Hakata and Tokyo, and said services would be disrupted elsewhere on Friday.