Image source, Getty Images

Nepal's finance minister has estimated the country will need between $4 billion (£2.95 billion) and $5 billion to rebuild the country after the devastating flood.

"This is just an estimate. Loss and damage is being assessed," Swarnim Wagle tells Reuters news agency.

As well as wiping away homes, the flood has destroyed key infrastructure like roads and bridges.

Hydropower plants have also been hit, with these satellite images appearing to show an industrial site reduced to virtually nothing.

Ashok Dahal and Kamal Pariya
BBC Nepali, reporting from Nuwakot district

We are on our way to a military training school in Nuwakot district that has been converted into a search-and-rescue co-ordination hub.

Along the route, we continue to see aid trucks heading towards Nuwakot, carrying supplies for communities affected by the disaster.

We saw similar convoys on the day after the floods.

It seems the flow of relief vehicles has not slowed underlining both the scale of the need and the ongoing relief effort, with assistance continuing to be distributed from Nuwakot to affected areas.

The image below shows an aid distribution effort organised by a local hospital in partnership with a media organisation.

Azadeh Moshiri
Reporting from Trishuli, Nepal

Rain has been falling again across northern Nepal, and emergency teams are warning it’s making it difficult to reach some of the worst-affected areas.

Wednesday’s flood has swept away bridges and roads, and helicopters have been making repeated journeys back and forth to ferry survivors to safety.

Thousands of people cut off from the rest of the country have been saved so far. In neighbouring India, authorities have said seven bodies have been recovered from rivers flowing from Nepal, and they are believed to be victims of the flood.

Here in Trishuli, the military have been issuing warnings of more possible flooding.

There are fears a glacial lake formed of flood water and debris near the Nepal-Tibet border could breach its banks. But for now the greatest danger has passed, leaving the country to confront the worst disaster Nepal has seen since an earthquake in 2015.

Images of a rescued elderly woman - covered in mud and being carried in the scoop of a digger - have featured prominently in coverage of the disaster.

She is now known to be 97-year-old Guna Maya Bohara. Her doctors say she is recovering in hospital.

Speaking to BBC Nepali, her great-nephew Dipak Bohara says she looked like "a warrior" who had returned victorious from battle.

The operation to pull her out of the rubble of her care home took four hours.

Dipak Bohara travelled from Kathmandu to help rescue his great-aunt.

Pictures taken today - three days after the powerful flash flood hit - show the ongoing devastation.

In Nuwakot district in Nepal, one man was pictured collecting belongings from his damaged house.

Another could be seen surveying the destruction, as damaged buildings are covered in mud.

Meanwhile, the rescue operation continues.

Image source, Reuters

Image source, Reuters

Image source, Reuters

Image source, Reuters

We have now had an update from Nepal's National Disaster Risk Reduction & Management Authority (NDRRMA).

In a social media post less than hour ago, they report 626 people are dead in Nepal, with 2,426 missing.

This is higher than the 616 death toll reported by Nepal Police a short while ago.

It is also a significant jump in the number of people missing, up from 1,924 reported by the same authority yesterday.

Officials from the Chitwan district in the Southern Central Terai of Nepal say that of the 233 bodies they've recovered from the flood so far, only four have been identified.

"The bodies/remains collected from health institutions and riverbanks are in a state of decomposition and are no longer identifiable," the District Administration Office of Chitwan says in a statement.

The remaining 229 bodies are being kept in holding centres and health institutions, the officials add, noting that DNA samples are still being collected and recorded.

China's state media has released footage of emergency personnel arriving at Gyirong Country in Tibet to help with rescue efforts.

Members of the Sichuan Fire and Rescue Mobile Corps are seen scouring the mountainous areas, with the primary task of searching for buried and missing persons.

New images from Devighat, an area in the Nuwakot region in central Nepal, show clearly the devastation and destruction of Wednesday's flash flood.

The place is known as a sacred and prominent pilgrimage site, situated at the meeting point oftheTrishuli River and Kali Gandaki River.

Image source, Reuters

Image source, Reuters

Image source, Reuters

Image source, Reuters

The death toll in Nepal is actually 616, police in Nepal say, not 626 as reported earlier.

Chinese state media had earlier confirmed seven fatalities in Tibet. Assuming the figures don't overlap, that would take the total killed to at least 623.

Laura Bicker
China correspondent

Water levels in the lake which formed amid the debris of the landslide in Tibet are rising once again, according to Chinese state media.

There is a continued risk of secondary mudslides or landslides, the report adds.

The command team in charge of rescue efforts around Gyirong port, the main land border between Nepal and Tibet, have launched drones and set up observations posts to monitor the slopes and provide an early warning system to rescuers working nearby.

Search teams are making the most of a short weather window to try to find survivors.

Work is also underway to try to re-open the road.

Image source, Reuters

The death toll in Nepal has risen to 626, according to local police.

That's a significant jump from the last update of 579 dead, with almost 2,000 people still missing.

International aid agencies and various governments have stepped up emergency relief efforts amid reports that nearly 2,000 people are still missing after devastating floods in Nepal.

Countries including the European Union, Canada, and the United States have announced that they will send aid materials or financial assistance to Nepal.

According to a United Nations spokesperson, tens of thousands of households are in need of food and emergency drinking water.

According to Nepali officials, about 4,000 people have been rescued, while more than 500 have been confirmed dead.

China has also confirmed seven deaths, with more rain expected, making rescue and search operations more difficult.

Laura Bicker
China correspondent, reporting from Beijing

Image source, CCTV

New footage from Chinese state media reveals the scale of the destruction on the Tibetan side of the border. Rescue teams are shown wandering in a wasteland of mud and rock while calling out - "anyone there?"

They finally reached the land border on Friday afternoon after trekking over mountains, scaling cliff faces and crossing raging rivers to get to Gyirong port, the epicentre of the disaster in Tibet.

“It was scene of ruins,” Zou Mingqi, a fire and rescue team leader from Lhasa told the state broadcaster CCTV.

“The area around the old border gate was covered in thick mud, and your feet would sink into it when you stepped on it.”

Gyirong port was one of the main crossing points for tourists and traffic travelling between Nepal and Tibet.

Satellite images appear to show that it has been completely flattened.

At least 554 people are missing in the area and 7 people are confirmed dead.

Image source, CCTV

Image source, CCTV

Image source, CCTV

With debris and water having built up in the wake of Wednesday's devastating flash flood, rescuers on the ground face a "difficult situation" amid risk of another flood in the coming days, according to a geological expert.

Dr Alena Giesche, a geologist with the US Geological Survey, tells the BBC at least one of the areas that accumulated debris from the initial flow already appears to be releasing some water.

"People are working in these same hazardous regions and facing that risk posed by further debris and mud and the boulders that were dislodged on the ground and could still be unstable," she says.

Gieche adds that while the flash flood was a large event, it is not unprecedented, especially with the landscape of the Himalayas being "inherently unstable".

"It's also peak melt season for the ice and peak summer monsoon season," she says, citing two known triggers for glacial collapses and landslides that are exacerbated by rainfall.

Image source, Getty Images

If you're just joining us, rescue efforts have entered their fourth day after the seismic flash flood along Nepal and Tibet's border, with almost 2,000 people still missing.

Here are the latest developments:

• The official death toll in Tibet has risen to seven, with 554 people still missing, according to Chinese state media. It's unclear whether these figures overlap with those in Nepal, where more than 570 people have died and at least 1,900 are missing.
• European Commission President Ursula von der Leyen has announced Europe is committing €2m (£1.7m) in immediate humanitarian aid for Nepal, saying the support will deliver "life-saving assistance to families and communities hit hardest".
• Chinese President Xi Jinping has extended his condolences to his Nepalese counterpart, Ram Chandra Paudel, saying: "I am confident that the people of both countries will surely join hands to overcome this disaster as soon as possible and rebuild their homes."
• Satellite images taken before and after flood reveal the dramatic scale of the disaster, with previously colourful buildings lining the river along the Nepal-Tibet border now almost entirely engulfed by mud, water and debris.
• The number of Australians missing in Nepal has now risen to 41, according to a government minister - an increase from the 39 people reported on Friday.

As we've been reporting, many tourists missing in Nepal and Tibet had travelled to the region on pilgrimages.

The area is a popular site for Hindus and Buddhists, with tens of thousands visiting each year on trips to sacred sites.

Indian nationals, several of whom were on pilgrimage, form the largest group of foreign visitors affected by the flash floods.

Many Indian tourists travel through Nepal to Tibet's Mount Kailash, a 6,400 metre (21,000ft)-tall peak that holds sacred significance for Hindus, Buddhists and Jains.

Image source, Future Publishing via Getty Images

Deepak and Madhu Ahuja, who travelled from the US to Mount Kailash, are among the many pilgrims who went missing.

"We just love them a lot and want them to come home," their daughters told the BBC.

Nepal is not only a popular destination for pilgrims, it also draws hikers from around the world.

Rasuwa, the north-central region hit hardest by the flood, is a hiking hotspot. While August is not peak season, authorities believe some hikers were present when the flood struck.

There has been a steady stream of information from authorities since flash floods devastated parts of Nepal and Tibet on Wednesday. But in Nepal, where we are able to gather the most information, there have been conflicting reports.

The number of casualties and people missing following the flash floods has been updated several times, and differing numbers have been reported by the Nepalese police and the country's national disaster authority.

As efforts to rescue survivors, search for the missing and recover bodies continue, figures are being constantly updated, and it is highly likely that some numbers don't match due to the speed of the emergency operation.

It's hard to know what is happening in Tibet - it was annexed by China in the 1950s and is one of the most strictly controlled regions governed by the country. It is difficult for media to gain entry, so we rely on Chinese national media for updates, our China correspondent explains.

Simon Atkinson
Australia reporter

The number of Australians missing in Nepal has now risen to 41, according to a government minister - an increase from the 39 people reported on Friday.

One of those who was unaccounted for, 25-year-old Cara Severino, has now made contact with their family. She was hiking in a different area to the disaster zone.

Among those still missing is 46-year-old Reshma Patel from Newcastle in New South Wales. She was one of 11 Australians making a pilgrimage to Kailash Mansarovar temple with the Isha Foundation.

According to her friend Chin Valsan, Reshma’s last known location was the Tibet-Nepal border around 10 minutes before the impact.

“Family and friends have been unable to reach her and are deeply concerned for her safety,” Dr Valsan wrote on a Facebook page.

Her husband Bhavin Patel has flown to Nepal to await news of his wife.

Image source, Chin Valsan via Facebook

Aerial images of towns and villages on the Nepal-Tibet bored taken before and after floods and mudslides left hundreds dead and thousands missing capture the scale of the disaster.

In these images taken via satellite last month, the colourful buildings of Timure, Nepal, can be seen lining the river. Now, only a few remain and the area has been almost entirely enveloped by mud, water and rock.

Image source, Vantor/Handout via REUTERS

Image source, Vantor/Handout via REUTERS

The Rasuwagadhi Hydropower Plant which sits on the Trishuli River. Days ago, it was a thriving industrial site. Now, virtually no trace of it visible from the air remains.

Image source, Vantor/Handout via REUTERS

Image source, Vantor/Handout via REUTERS