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Rescuers in Nepal and Tibet are scrambling to search for survivors after Wednesday's flash flood destroyed homes, swamped roads and swept away bridges
More than 900 people are missing and at least 389 have died in Nepal - drone footage shows the scale of the devastation
Meanwhile, three people have died and at least 558 are missing in Tibet, although it's not clear if these figures overlap with Nepal's
A Nepalese man living in Aberdeen tells the BBC how he lost three close family members in the flash floods
Another man from East London says his sister was "really excited" to go on her first pilgrimage, but has now been out of contact
The glacial collapse that is said to have caused the flash floods happened on the Nepal side of the Himalayan mountains, Nepalese officials tell the BBC
There are risks of more floods: a lake of rising water has formed at a site along the China-Nepal border - prompting fears it could burst its banks, reports Laura Bicker in Beijing
We can bring you some images from a major motorway in Kathmandu, Nepal, which has been halted by the floods.
Vehicles are stranded and congestion is building as the roads remain closed.
Image source, Getty ImagesVehicles remain stranded along the Kalanki-Thankot-Nagdhunga route in Kathmandu, Nepal
Image source, Getty ImagesTrucks and cars are queuing one after the other, as traffic halts
The most recent update from Nepal police says that the number of injured and rescued people in the country now stands at 466, and it breaks it down by district.
We're getting different figures from various agencies in Nepal. Earlier, we heard from the country's prime minister that at least 573 people have been rescued today.
Laura Bicker
China correspondent
Rescue efforts in China are being led by the People’s Liberation Army, but state media said they face multiple challenges.The Air Force did manage to use a brief weather window to fly a drone over the area to try to find survivors and assess how safe it was for rescue teams to enter.
The border town of Gyirong is the main crossing for people and traffic heading between Nepal and China. Video footage appears to show a crushing wall of water crashing through buildings and washing away trucks and cars.
Thousands of pilgrims were making a journey along this route from Nepal towards a sacred mountain in Tibet. This is also one of the most controlled and politically sensitive regions of China.
Access to Tibet is restricted for foreigners. All the information we receive is from Chinese state media which is also carefully controlled.
Image source, AFP via GettyA giant screen outside a shopping centre in Beijing shows a news report on the floods
The number of people killed in Nepal by flash flooding has risen to 389, according to Nepal police.
This is an update from the previous death toll of 359 given by authorities a few hours ago.
Image source, Balendra ShahNepal's Prime Minister Balendra Shah visits the flood-hit Nuwakot district
We've heard again from Nepal's Prime Minister Balendra Shah, who has been visiting areas affected by the recent floods.
He says over 13,000 security personnel from the Nepali army, armed police force and national police have been mobilised to engage in search operations - with 69 flights rescuing 573 people across the day.
Temporary relief camps have been set up and free treatment is being provided to injured citizens, he adds.
Shah says the government's focus is on saving lives, searching for those who are missing, and providing relief to those affected.
Rebecka Pieder
US reporter
Ramesh Sharma, 65, and Neelam Sharma, 64, two US citizens of Indian descent, were travelling to Mount Kailash on a pilgrimage when the disaster struck.
Their daughter, Radhika Sharma, has not heard from them since the floods.
"They're very religious," Sharma tells the BBC. "So this is something that was very important to them."
"The last we know is they were at the border... about an hour before the floods," she says. "And we are hoping that they made it to the Tibet side."
Sharma has spoken with the US Embassy in Beijing, who told her they are trying to locate US citizens in Tibet. She also tried to reach the US Embassy in Nepal to no avail. "No one has any answers," she says.
"We're just trying to piece together the story ourselves, to be honest," she adds.
Image source, Radhika SharmaRamesh and Neelam Sharma have not been in contact with family since the floods
Image source, ReutersA child at an army training centre in Nuwakot district, which has become a base for emergency operations
The flash floods in Nepal have left more than 17,000 children in need of urgent humanitarian assistance, according to children's charity Unicef.
Its representative to Nepal, Alice Akunga, says children in the affected areas "saw their lives being literally washed away", while "too many lost their lives and loved ones".
"Children who have survived the floods now face heightened risks of disease, malnutrition, violence and exploitation," she adds.
Akunga says Unicef is offering support on the ground, but "urgently" needs more resources "to reach every child in need".
The charity is appealing for $17.2m USD (£12.6m) to sustain its early response "until the full extent of needs are assessed", warning its services to children and women will be "severely constrained" without funding.
As search and rescue efforts continue following the floods and landslides in Nepal, Maithali Barrack, an army training centre in Nuwakot district, has become a key base for emergency operations.
Helicopters are airlifting survivors from affected areas, while rescue teams work to reach communities cut off by the disaster.
Here are some of today's pictures:
Image source, ReutersA child airlifted from Rasuwa district receives first aid at the mobile hospital inside Maithali Barrack
Image source, ReutersA large group of people gather as survivors are brought to Maithali Barrack
Image source, ReutersA Chinese national sits on a medical bed after receiving first aid at a mobile hospital inside Maithali Barrack
Image source, ReutersMaithali Barrack is being used as a primary base to airlift survivors of the disaster
Laura Bicker
China correspondent
Image source, ReutersThe Communist Party in Chinese-controlled Tibet is calling on grassroots members to help maintain stability in the region in the wake of the mudslide.
The party is wary of any anger or instability in a fragile region, which has a history of resistance to Beijing's rule.
They are urging members to help in disaster relief efforts in their area and provide emotional guidance or psychological support to affected residents - especially those who have lost loved ones.
The emergency notice by the Organisation Department also offers incentives saying those who perform badly or are found guilty of dereliction of duty will be held accountable.
Archana Shukla
India business correspondent
The last video from a tour group was sent just nine minutes before the floods hit, says the owner of a travel company.
Roshan Pandey, of Fishtail Tours and Travels, says he's heard nothing from the group of 20 tourists since then.
Two Americans, one Briton and 17 Malaysians, all bound for Mount Kailash, along with seven Nepali staff guiding them are missing.
They were near Timur, a Nepali border town close to the Tibet crossing, where they had stopped to wait for a small landslide, which are common in the region, to clear.
The group had just sent a video showing it was under control, and that they were about to cross into Tibet.
"Not a single piece of brick is visible in that area, everything is under mud," Pandey said.
As we reported earlier, officials in Nepal are warning of a possible secondary flood risk near the Bhote Koshi river.
The National Disaster Risk Reduction and Management Authority says satellite information from China suggests the river has been "blocked" and that a "lake" has formed near the site of yesterday's flash flood.
In a social media post, it says the information suggests "the lake is in the process of rising and there is a risk of bursting".
It warns residents and rescuers in the lower bank area to "exercise special caution" and stay in safe places away from the river banks.
Laura Bicker
China correspondent
Image source, ReutersA giant screen in Beijing broadcasts news footage of the flood recovery effort in Tibet
Tibet, which China annexed in the 1950s, is one of the most strictly controlled regions in the country.
It has long demanded greater autonomy and is heavily monitored because Beijing fears any signs of instability such as protests.
That is why orders are now coming personally from the top leader Xi Jinping, and Premier Li Qiang is on site today. It is rare for him to make a visit so soon after a major disaster.
To get into Tibet requires a special visa and it is difficult, if not impossible, for foreign media to gain entry. Trying to contact people there is just as hard.
This makes it very difficult for us to know what is happening and we are relying heavily on reports from Chinese state media.
Pilgrims making their way from Nepal through Tibet to the sacred mountain of Mount Kailash need four separate permits, which includes special permission from the Chinese military.
The Chinese foreign ministry has said 260 of the 558 people missing are tourists or pilgrims. We don't know how many of the remaining are Tibetans, and how many are Chinese people who have moved there to run businesses or work on infrastructure projects.
Moyurie Som
BBC Bangla
We are continuing to hear from families in India waiting for news of relatives caught up in the deadly flash floods.
Among them is the family of Ranajit Kumar Howladar, 63, who is part of a group of 30 tourists and two tour assistants from West Bengal who have been unreachable since 25 August.
Howladar was travelling to Kailash Mansarovar in Tibet, a major pilgrimage site sacred to Hindus and several other faiths.
His wife Gayatri tells BBC Hindi she last spoke to him on Tuesday night. "We just hope he is alive," she says.
Their daughter Sunanda, who has been seeking information from police and the tour operator, says the agency told her two women from the group had been rescued, but could not provide information about the others.
Howladar, a retired railway employee, had waited until retirement to make what his wife described as a "dream" pilgrimage.
As we've been reporting, the US Geological Survey has said flash floods were sparked by a glacial collapse in the mountainous area close to the Nepal-Tibet border.
This resulted in seismic activity and caused "catastrophic" impacts downstream of the Trishuli river, as floodwaters spread into several regions in Nepal.
The Rasuwa district is the closest to the origin of the floods, while the neighbouring Nuwakot district has also been severely impacted.
In its latest update, Nepal police says of the 359 bodies recovered so far, 17 were recovered from Rasuwa and 28 in Nuwakot.
It added that 132 bodies have been recovered in Chitwan, which is where the Trishuli runs its course and flows into the Seti Gandaki river.
Image source, PA MediaKing Charles III says he and the Queen are “heartbroken” and send their “most profound sympathy” to those affected by the “devastating” flash floods in Nepal.
“Many in the United Kingdom have strong, deep and personal ties to this part of the world," the British monarch says in a written message.
“We send our most profound sympathy to all those who have so tragically lost their loved ones and we feel deeply for the many families awaiting anxiously the news of friends and relations."
The King also pays tribute to "the police and Armed Forces personnel who lost their lives while carrying out their courageous duty in the service of others".
He adds that "as always, the United Kingdom stands ready to help support those in need".
Azadeh Moshiri
Reporting from Nepal
Here at Kathmandu's domestic airport, we're seeing military support arriving - all part of the effort to find the hundreds who are missing right now.
Families are gathering, waiting for any information they can find.
We spoke to one woman who was in contact with her husband at 08:30 local time (02:45 GMT) yesterday but hasn’t heard from him since. She’s desperate for information.
"My husband had taken the car to pick up a guest," she says, adding that she has come today because she heard that the injured are being brought here after being rescued.
Hannah Roe
BBC South East
Pramod Poudel says friends have told him 90% of his village is gone
In parts of the UK some people with relatives in Nepal are fearing the worst.
"To be honest I believe that they’re not there anymore," says Pramod Poudel, whose wife, mum, uncle and brother have been reported missing.
Poudel, who runs the Mo Mo Nepalese street food company in Sussex, says he knows his father is alive and will be flying to Nepal to meet him.
“We’ve got to accept what happened because it’s obviously not only my family,” he adds.
“When I talk with my friends they reckon about 90% of my village is not there and all of the people have gone as well."
Pramod Poudel from Uckfield hasn't heard from his wife, mum, brother or his uncle.
A huge search and rescue operation is underway across Nepal following the devastating flash floods that struck several areas close to the country's border with Tibet.
Nepal's National Disaster Risk Reduction and Management Authority says 9,260 members of the police, army and armed police force have been mobilised to help in the operation.
Here are some of today's pictures from across the country.
Image source, AFP via Getty ImagesRescuers transport stranded residents using a bulldozer in the Devighat area in Nepal's Nuwakot district
Image source, AFP via Getty ImagesPolice rescue stranded residents from a house buried in Nepal's Nuwakot district
Image source, AFP via Getty ImagesVolunteers use bulldozers to clear mud and debris along a road in the Nuwakot region
Image source, AFP via Getty ImagesA member of the security forces and his sniffer dog search for survivors in the Nuwakot region
Laura Bicker
China correspondent
A lake of rising water has formed at a site along the China-Nepal border prompting fears that it could burst its banks - just as rescuers try to find survivors after yesterday’s landslide.
Chinese search teams in Tibet have spent the day assessing the risk of flooding near Gyirong port after a lake formed near the confluence of Nepal’s Chochen river and the Puruchangpo Zangbo river.
They told state media that stabilising this body of water was a priority to keep rescue personnel on the ground safe.
China’s Ministry of Water Resources has used modelling techniques to estimate how much water is in the lake and now say that with continued rainfall, there is a high risk it could burst within the next three days.
The ministry said it will prepare for a potential breach and provide support for emergency rescue efforts.
Gabriela Pomeroy
Live reporter
Image source, Praneeth SajeepaI've been speaking to Kavya Koulagi Jayatheertha, whose uncle Prabhath Sajeepa is missing on a journey to the Kailash Yathra, a sacred pilgrimage for Hindus.
Sajeepa, a US citizen who works for a software company in California and has a wife and two children, was on his first pilgrimage with a group from the spiritual Isha Foundation organisation.
“It has been the most devastating news," Kavya tells me.
The family last had contact with Sajeepa on Monday. They’ve been told he was at the Gyirong border crossing when the flash flood hit the area.
"It has been terrible. I hope he is somewhere safe," his niece says.
"We are hoping for good news."