The storm, dubbed Alex, ravaged several villages around the city of Nice on the French Riviera. Nice Mayor Christian Estrosi called it the worst flooding disaster in the area for more than a century after flying over the worst-hit area by helicopter.

“The roads and about 100 houses were swept away or partially destroyed,” he told French news channel BFM.

At least eight people were missing in France, authorities said. These included two firemen whose vehicle was carried away by a swollen river, according to local witnesses cited by several French media.

In Italy, at least one person died and up to 11 people were missing, local authorities said, Reuters reported.

A fireman was killed by a falling tree in the Valle d’Aosta region, while three people travelling in a van were swept away by flood waters in Val Roya on the border with France.

Six German trekkers were among the missing after failing to return from a trip in the mountains in the province of Cuneo.

Officials in the Piedmont region reported a record 630 mm (24.8 inches) of rain in just 24 hours in Sambughetto, close to the border with Switzerland. The Piedmont regional chief Alberto Cirio called on the government to declare a state of emergency.

Television images shot in Italy showed several roads and bridges in the northwest of the country had been swept away by flood water and numerous rivers were reported to have burst their banks.

Eric Ciotti, a member of French parliament who is from one of the worst affected villages in the area, Saint-Martin-Vesubie, said several villages were cut off as they are located in steep-sided valleys of the mountainous region.

Meteo France said that rains of 450 mm (17.7 inches) of rain were registered over 24 hours in some areas – the equivalent of close to four months of rain at this time of the year.

There was more rainfall than on Oct. 3 2015, when floods caused the death of 20 people in and around the French Riviera city of Cannes, Jeremy Crunchant, the director of civil protection, told France Info.

Venice, a long-delayed flood barrier system successfully protected the lagoon city from a high tide for the first time on Saturday, bringing big relief following years of repeated inundations.

Streets and homes were flooded with sewage water in Karachi on Tuesday, where the city’s outdated drainage and waste systems were overwhelmed by another spell of heavy rain, the Guardian reprted.

Of the total rain-related casualties, 31 deaths were reported in southern Sindh province, while 23 people died in the province of Khyber Pakhtunkhwa, according to the agency.

Troops, rescuers and volunteers from the radical group Tehreek-e-Labbaik were seen evacuating people from inundated residential neighborhoods in Karachi as some families waded through waist-high water. Hundreds of people were forced to take shelter in the houses of relatives in the country’s largest city.

According to the disaster agency, troops using boats evacuated 300 people from rain-hit district of Dadu in Sindh province, while 1,245 people were evacuated from Karachi’s rain-hit areas, where residents said they were still waiting for help.

Scores of vehicles were seen submerged in floods in Karachi, Pakistan.

The rains are expected to continue this week in Karachi, where the prime minister, Imran Khan, earlier this month sent troops to help local authorities in pumping out rainwater from inundated residential areas.

Monsoon rains are lashing Pakistan at a time when authorities are trying to contain the spread of the coronovirus, which caused more than 6,200 deaths since February when the country reported its first case. Pakistan reported nine more COVID-19 deaths Tuesday, one of the lowest numbers of daily fatalities since March.

Every year, many cities in Pakistan struggle to cope with the annual monsoon deluge, drawing criticism about poor planning. The monsoon season runs from July through September.

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.

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.

Nine people were killed and more than 30 were missing in Myagdi district, 200 km (125 miles) northwest of the capital Katmandu, where several houses were destroyed on Friday, district administrator Gyan Nath Dhakal said, Reuters reported.

“The toll is expected to increase as rescuers had just reached the remote site to look for victims,” Dhakal said, adding that 50 people had been plucked to safety using helicopters.

In neighboring Kaski district, seven people were killed, said a second government official in the tourist town of Pokhara.

Another seven were killed in the Jajarkot district in the far west.

“We are searching for eight people who are still missing,” said Kishore Shrestha, a senior police official.

In the southern plains bordering India, the Koshi River, which causes deadly floods in the eastern Indian state of Bihar almost every year, was flowing above the danger level, police said.

Landslides and flash floods are common occurrences in mountainous Nepal during the June-September monsoon every year.