In the province of Ma’arib east of the capital city of Yemen, 19 children were among 30 people killed by the flash floods, AFP reported.

In the province’s displaced person camps, 1,340 families saw their tents and belongings swept away.

In Lahij province, seven people drowned when their vehicle was swept downstream.

Another four people were killed on the road connecting the southern provinces of Hadramawt and Shabwa, the report added.

The houses in Yemen’s the UNESCO-listed Old City of Sana’a are also collapsing due to heavy rains, as months of floods and storms assail a country already reeling from war, food shortages, and disease.

The distinctive brown and white mud-brick houses of Sana’a’s historic neighborhoods, which date from before the 11th century, have long been under threat from war and neglect.

The destruction has dealt a new blow to a country already in the grips of what the United Nations describes as the world’s worst humanitarian crisis after years of Saudi-led war against the Arab country.

Five years of war have killed more than 100,000 people, left 80 percent of the population reliant on aid, and pushed millions to the brink of famine.

In addition, and on top of the new coronavirus that is believed to be spreading largely undetected, heavy rains spread diseases like cholera, dengue fever, and malaria.

The IOM Displacement Tracking Matrix (DTM) found that at least 596 families – or 3,567 individuals – had been forced out of their homes once during the period from 2-8 August, noting that the city of Hudaydah recorded the largest displacement figures with 568 families affected, the Middle East Monitor reported.

According to the organization, from January 1 to August 8, IOM Yemen’s Displacement Tracking Matrix monitored the displacement of 18,455 families or 110,730 individuals at least once.

For weeks, Yemen has been witnessing heavy rains which have caused flooding.

A Yemeni official from the Organization for the Preservation of Historic Cities of Yemen (GOPHCY) warned that 5,000 buildings in the Old City of Sana’a, which is registered as a World Heritage Site, are at risk of collapse as a result of the rains.

The country’s Flood Forecasting and Warning Center (FFWC) reported that the situation may worsen further as major rivers in the central districts around Dhaka are set to rise in the next couple of days.

After starting in late June, the flooding left more than 1 million people marooned at their homes and at least 41 people, including 31 children, dead, Disaster Management Ministry spokeswoman Tasmin Ara Azmiri told DPA. Drowning caused most of the deaths, she added.

Referring to the Global Flood Awareness System, the humanitarian information website ReliefWeb has warned the current floods may be the most prolonged since 1988 flooding that submerged two-thirds of Bangladesh for more than two months, causing extensive damage.

This time, 31 out of 64 administrative districts have been submerged by floodwaters, prompting many people to move to shelters, according to the disaster management department.

The flooding has caused widespread damage to flood protection embankments, crops, poultry, livestock and fisheries, according to the website.

It may further exacerbate the humanitarian situation amid the handling of the coronavirus pandemic, which has left 3,000 people dead, it added.

Emergency supplies of food and cash support have been dispatched, Azmiri said.

The FFWC predicted the waters are likely to start receding next week. South Asia experiences flooding almost every year during the monsoon season, which runs from June through September.

The overflowing Brahmaputra River, which flows through China’s Tibet, India, and Bangladesh, has damaged crops and triggered mudslides, displacing millions of people, officials said.

More than 2.75 million people in Assam have been displaced by three waves of floods since late May that has claimed 79 lives after two more deaths were reported overnight, a state government official said.

“The flood situation remains critical with most of the rivers flowing menacingly above the danger mark,” Assam water resources Minister Keshab Mahanta told Reuters.

Assam is facing the twin challenge of combating floods and the coronavirus pandemic. Out of 33 districts, 25 remained affected after the current wave of flooding, beginning a fortnight ago.

India is grappling with the novel coronavirus, which has infected nearly 1.1 million people and 26,816 have died from the COVID-19 disease, government data showed on Sunday.

In neighboring Nepal, the government asked residents along its southern plains on Sunday to remain alert as heavy monsoon rains were expected to pound the Himalayan nation where more than 100 have died in floods and landslides since June, officials said.

Some 110 people were killed and another 100 injured as landslides and flash floods washed or swept away homes, upended roads and bridges and displaced hundreds of others in 26 of the country’s 77 districts, police said.

Home ministry official Murari Wasti said the death toll was expected to rise as 48 people were still missing.

“Search and rescue teams are looking for those who are missing in different places but chances of finding them alive are slim,” Wasti told Reuters.

Barun Paudel of the weather forecasting office in the capital, Kathmandu, said heavy rains were expected to pound much of the mainly mountainous nation in the next four days.

“We have urged residents to remain alert against possible landslides and floods,” he said.

Landslides and flash floods are common in Nepal, India’s Assam and Bihar states during the June-September annual rainy season.

Torrential annual rains resulting in monsoon floods are crucial for agriculture in South Asia, but this year India is also grappling with the virus, which has infected 968,875 people and killed 24,915, health authorities say.

The floods have killed at least 10 people and injured more than 70 in the states of Assam, Bihar, and Jharkhand, where heavy rain has submerged thousands of villages in the past 24 hours as authorities battle to ensure social distancing in relief camps.

“We have floods taking a deadly turn and simultaneously we are fighting the pandemic spreading its tentacles everywhere,” Assam’s health minister, Hemant Biswa Sarma, told Reuters.

At a time when world attention is focused on the crisis in the United States and South America, a human tragedy is swiftly unfolding in South Asia, said John Fleming of the International Federation of Red Cross and Red Crescent Societies.

“COVID-19 is spreading at an alarming rate in South Asia, home to a quarter of humanity,” said Fleming, the group’s head of health in the Asia-Pacific region, referring to the contagious respiratory disease.

“India alone is nearing 1 million infections in the coming days.”

Officials said that swathes of Assam’s Kaziranga National Park had been submerged with at least 50 wild animals dead, while some rhinos had strayed into villages, adding to the hazards relief and rescue workers face.

The UNESCO World Heritage site is home to two-thirds of the world’s population of the one-horned rhinoceros.

Water levels at major rivers were rising Tuesday at around two dozen points in 20 districts. Many new areas in northern, northeastern, and central Bangladesh have been affected over the last 24 hours, Arifuzzman Bhuiyan, an executive engineer with the Water Development Board, said by phone. Bangladesh has 64 districts.

“The situation is worsening,” he said. “The worst thing is that the floods are getting prolonged this year, which is a bad sign.”

Bhuiyan said heavy rainfall and rushing waters from upstream India were the main reasons for the floods in the delta nation of 160 million people, which receives monsoon rains between June and October every year, often leading to flooding, AP reported.

The floods started late last month, and after briefly easing continued to worsen, affecting many new areas, destroying crops and driving people from their homes in several impoverished regions. Bangladesh is crisscrossed by 230 rivers, including 53 shared with India.

In the northern district of Kurigram, one of the worst-hit areas, thousands of villagers have moved from their homes to higher ground since the weekend, bringing along their cattle and other belongings, said Mizanur Rahman Soikat, project coordinator with the Bidyanondo Foundation, a local charity. The foundation has been distributing both cooked and dry food to the flood-affected villagers, many of whom have lost their crops and livelihood.

Soikat said that over the last few weeks, the charity has distributed food to some 135,000 people in Kurigram, while the government’s relief office was also providing food, cash, and cattle food.

“Over the last two days, the situation has deteriorated and many villages went underwater in the district,” he said by phone. “I have seen thousands taking shelter.”

The International Federation of Red Cross and Red Crescent Societies said in a statement Monday that more than a million Bangladeshis have been marooned by the floods, with the worst of it happening since the weekend.

“Thousands of people are expected to leave their homes throughout the beginning of this week to seek shelter in the higher ground as the Water Development Board warned that the onrush of water from upstream would further intensify,” the statement said.

A.T.M. Akhteruzzman, a relief and rehabilitation officer in the northern district of Rangpur, said about 50,000 people who live along the Teesta River basin have been marooned.

“Waters are coming from India, while heavy rainfalls in the region are causing havoc,” he said. “We are trying to do our best to stand by the people, as we have already provided more than 300 tons of rice, cattle food, baby food, and a good amount of cash. Our relief operations will continue.”

The state broadcaster CCTV reported that water levels in southwestern Guangxi province on the Rong River rose to 5.04 meters (16.5 feet) above warning levels following heavy rainfall since Saturday morning.

In Aba in southwestern Sichuan province, about 60 meters (197 feet) of the road was destroyed after days of torrential rain caused the river to burst its banks.

Early warnings from the authorities meant there were no casualties reported. Rescue workers had to create a temporary route on the mountain top for vehicles to pass through, according to CCTV.

The network added that authorities in southern Jiangxi province are expecting severe flooding in Poyang, which is China’s largest freshwater lake, and joins the Yangtze near the city of Jiujiang.

Water levels on the lake were rising at an unprecedented pace and reached 22.65 meters (74 feet) by 13:00 GMT on Saturday. That exceeded the record high set in 1998 and was well above the alert level of 19.5 meters (64 feet).

The floods since Monday have already affected 5.2 million people in Jiangxi province, with 432,000 people evacuated from their homes, Al Jazeera reported.

It also damaged 4.56 million hectares (11.27 million acres) of crops and destroyed 988 houses, causing damage estimated at nearly $929m, CCTV reported.

China’s emergency management ministry is sending aid to the province in the form of assault boats, tents, folding beds, and blankets.

Elsewhere, a county in central China’s Hubei Province raised the flood-control response from level 2 to level 1, the top level of China’s four-tier emergency response for floods.

Yangxin County in Hubei’s Huangshi City has now had five rounds of heavy rain since the beginning of the rainy season, with a total of 714mm (28 inches) of rainfall between June 8 and July 10.

That is near twice the amount expected for that time of year.

The Chinese government has allocated about $44.2m for disaster relief in flood-hit regions of the country, the National Development and Reform Commission said on Saturday.

Parts of Nagano and Gifu, including areas known for scenic mountain trails and hot springs, were flooded by massive downpours.

Footage on NHK television showed a swollen river gouging into the embankment, destroying a highway, while in the city of Gero, the rising river was flowing just below a bridge.

Flooding and mudslides disrupted parts of the main road connecting Kamikochi and Matsumoto, two main tourist destinations in Nagano, stranding hundreds of residents and visitors, though they are believed to have safely evacuated. In neighboring Gifu, hundreds of others were also isolated in the hot springs town of Gero and Ontake.

In another mountainous scenic town of Takayama, several houses were hit by a mudslide, their residents all safely rescued.

As of Wednesday morning, the death toll from the heavy rains starting over the weekend had risen to 58, most of them from the hardest-hit Kumamoto prefecture. Four others were found in Fukuoka, another prefecture on Kyushu, Japan’s third-largest island.

At the peak, as many as 3.6 million people were advised to evacuate, although it wasn’t mandatory and the number who took shelter was not known. About half of the advisories have been lifted by Wednesday afternoon.

In places where rain had subsided, residents were busy cleaning up their homes and workplaces.

In Gero, a man washed down mud at the entrance of his riverside house despite the evacuation advisory. “I was told to run away and my neighbors all went, but I stayed,” he said. “I didn’t want my house to be washed away in my absence.”

In Oita, teachers at a nursery school were wiping the floor and drying the wet furniture. “I hope we can return to normal life as soon as possible,” Principal Yuko Kitaguchi told NHK.

Though the rains were causing fresh flooding threats in central Japan, flooding was still affecting the southern region. And search and rescue operations continued in Kumamoto, where 14 people are still missing.

Tens of thousands of army troops, police, and other rescue workers mobilized from around the country to assist, and the rescue operations have been hampered by the rains, flooding, mudslides, and disrupted communications.

In Kagoshima, a pickup truck was hit by a mudslide and fell into the ocean, but the driver was airlifted out with a head injury, according to Fuji Television. In another town in Oita, two brothers in their 80s were dug up alive by rescuers after a mudslide smashed into their hillside house, NHK said.

Chief Cabinet Secretary Yoshihide Suga urged residents to use caution. “Disasters may happen even with little rain where grounds have loosened from previous rainfalls,” he said, AP reported.

Suga pledged continuing search and rescue efforts, as well as emergency funds for the affected areas.

Japan is at high risk of heavy rain in early summer when wet and warm air from the East China Sea flows into a seasonal rain front above the country. In July 2018, more than 200 people, about half of them in Hiroshima, died from heavy rain and flooding in southwestern Japan.