Deep floodwaters and the risk of more mudslides that have left at least 34 people confirmed or presumed dead have hampered search and rescue operations in southern Japan.
Helicopters and boats have rescued more people from their homes in the Kumamoto region, with more than 40,000 defence troops, the coast guard and fire brigades taking part in the operation.
Large areas along the Kuma River were swallowed by floodwaters, with many houses, buildings and vehicles submerged almost up to their roofs.
Mudslides smashed into houses, sending people on to rooftops and waving at rescuers.
At a flooded elderly care home in Kuma Village, where 14 residents were presumed dead after rescuers reached them on Saturday, a rescue continued on Sunday for the dozens of remaining residents and caregivers.
Sixty-five residents and about 30 caregivers were trapped at the riverside care facility Senjuen when floodwaters and mud gushed in.
All the remaining 51 residents, including three who had hypothermia, had been rescued by boats and taken to hospitals for treatment by Sunday afternoon, officials said.
Shigemitsu Sakoda, a local rafting company operator who joined defence troops in the rescue effort at the nursing home, said floodwaters were still high on the first floor when they arrived at the scene on rafts.
“So we smashed windows with a hammer to get in,” he told Japanese broadcaster NHK.
Soldiers went up to the roof to rescue survivors who were able to go upstairs while the waters rose, he said.
“Unfortunately, some of the residents could not make it to the second floor” Mr Sakoda said.
Overall, 18 people were confirmed dead, while 16 others, including those at the nursing home, were presumed dead.
Fourteen others were still missing as of Sunday afternoon.
Dozens of others were still trapped in inundated areas waiting to be rescued, according to the Fire and Disaster Management Agency.
In Hitoyoshi City, the deluge poured into houses near the main train station.
"The water rose to the second floor so fast and I just couldn't stop shivering," a 55-year-old woman who was visiting her relatives told the Asahi newspaper.
She and her relatives ran upstairs, swam out of a window and eventually took refuge on the roof to wait for their rescue.
As floods eased in parts of Kumamoto on Sunday, vending machines and cars lay scattered on mud-coated streets.
Some people were cleaning their homes, taking out damaged furniture and rinsing off mud.
More than 200,000 residents in Kumamoto prefecture were urged to evacuate following pounding rains on Friday evening and into Saturday.
But the evacuation was not mandatory and many people opted to stay home because of concerns over catching coronavirus, even though officials say shelters are adequately equipped with partitions and other safety measures.
Flooding also cut off power and communication lines, further delaying the search and rescue.
Nearly 6,000 homes in Kumamoto were still without electricity on Sunday, according to the Kyushu Electric Power Company.
The rainfall that exceeded 100 millimetres (4in) per hour has since subsided, but the Japan Meteorological Agency kept mudslide warnings in place across Kumamoto.
Prefectural officials said evacuation advisories were still in place due to more rain in the forecast. – AP