Helicopters, boats and thousands of troops were deployed across Japan Sunday to rescue people stranded in flooded homes Sunday as the death toll from a ferocious typhoon climbed to at least 19 with more than a dozen missing.

Public broadcaster NHK said 14 rivers across the nation had flooded, some spilling out in more than one spot.

The Tokyo Fire Department said a woman in her 70s was accidentally dropped 40m to the ground while being transported into a rescue helicopter in Iwaki city in Fukushima prefecture, a northern area devastated by the typhoon.

Cars are stranded on a road as the city is submerged in muddy waters after an embankment of the Chikuma River broke, in Nagano. Photo / AP
Cars are stranded on a road as the city is submerged in muddy waters after an embankment of the Chikuma River broke, in Nagano. Photo / AP

She was rushed to a hospital but died, a department official said.

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The casualty toll was compiled by Kyodo News service and was higher than one given by the government spokesman earlier Sunday, a day after Typhoon Hagibis made landfall south of Tokyo and battered central and northern Japan with torrents of rain and powerful gusts of wind. The typhoon was downgraded to a tropical storm Sunday.

"The major typhoon has caused immense damage far and wide in eastern Japan," government spokesman Yoshihide Suga told reporters, adding that 27,000 military troops and other rescue crews were taking part in the operation.

News footage showed a rescue helicopter hovering in a flooded area in Nagano prefecture where an embankment of the Chikuma River broke, and streams of water were continuing to spread over residential areas. The chopper plucked those stranded on the second floor of a home submerged in muddy waters.

Aerial footage showed tractors at work trying to control the flooding and several people on a rooftop, with one waving white cloth to get the attention of a helicopter. Nearby was a child's school bag. In another part, rows of Japan's prized bullet trains, parked in a facility, were sitting in a pool of water.

A stretch of Fukushima, in the city of Date, was also flooded with only rooftops of residential homes visible in some areas, and rescuers paddled in boats to get people out. Parts of nearby Miyagi prefecture were also under water.

The Tama River, which runs by Tokyo, overflowed its banks, flooding homes and other buildings in the area.

A vehicle falls off collapsed road in the typhoon-hit Kakuda city, Miyagi prefecture, northern Japan. Photo / AP
A vehicle falls off collapsed road in the typhoon-hit Kakuda city, Miyagi prefecture, northern Japan. Photo / AP

Authorities warned of a risk of mudslides. Among the reported deaths were those whose homes were buried in landslides. Other fatalities included people who got swept away by raging rivers.

Suga said recovery was on its way. Some 376,000 homes were without electricity, and 14,000 homes lacked running water, he said.

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Boats as well as helicopters were sent to the flooded areas, while rescue crew dug through dirt elsewhere to try to get people out from homes buried by landslides.

Several train service in the Tokyo area resumed early morning, although others were undergoing safety checks and were expected to restart later Sunday.

People look at the house damaged by landslide caused by Typhoon Hagibis in Sagamihara, near Tokyo. Photo / AP
People look at the house damaged by landslide caused by Typhoon Hagibis in Sagamihara, near Tokyo. Photo / AP

Ruling party politician Fumio Kishida said the government will do its utmost in rescue operations, including making sure that those who moved to shelters were taken care of.

He acknowledged Japan's power grids need to be strengthened so people in disaster areas can rely on timely information.

Rows of Japan's bullet trains, parked in a facility, sit in a pool of water in Nagano. Photo / AP
Rows of Japan's bullet trains, parked in a facility, sit in a pool of water in Nagano. Photo / AP

"So many risks remain, and it is a reality we must stay on guard," Kishida said on an NHK TV news talk show. "We must do our utmost. In these times, a disaster can hit anytime."

The Rugby World Cup match between Namibia and Canada, scheduled for Sunday in Kamaishi, northern Japan, was canceled as a precautionary measure, but organisers announced Japan will play Scotland as scheduled Sunday evening. Matches on Saturday had been cancelled. Stores and amusement parks had also closed.

As the typhoon bore down on Saturday with heavy rains and strong winds, the usually crowded train stations and streets of Tokyo were deserted with people advised to stay indoors. But life was quickly returning to normal under crisp clear skies Sunday.

Students and residents scoop dirt as the town is flooded Typhoon Hagibis, in Marumori, Miyagi prefecture. Photo / AP
Students and residents scoop dirt as the town is flooded Typhoon Hagibis, in Marumori, Miyagi prefecture. Photo / AP

Evacuation centers had been set up in coastal towns with tens of thousands seeking shelter. Kyodo News service said evacuation warnings had been issued to more than 6 million people.

A resident is rescued by a Japan Self-Defense Force helicopter as the house is submerged in muddy waters after an embankment of the Chikuma River broke. Photo / AP
A resident is rescued by a Japan Self-Defense Force helicopter as the house is submerged in muddy waters after an embankment of the Chikuma River broke. Photo / AP

The typhoon disrupted a three-day weekend in Japan that includes Sports Day on Monday. Qualifying for a Formula One auto race in Suzuka was pushed from Saturday to Sunday.

The authorities had repeatedly warned Hagibis was on par with a typhoon that hit the Tokyo region in 1958. But the safety infrastructure that Japan's modernisation had brought was apparent. The typhoon six decades ago had left more than 1200 people dead and half a million houses flooded.

- AP