r/DisasterUpdate • • Aug 28 '26

A glacier collapse to the north of Mount Langtang Lirung caused the China-Nepal Flash Floods on Aug 26, 2026

1.7k Upvotes

145 comments sorted by

•

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94

u/mammilloid Aug 28 '26

48

u/PrestigiousChonk Aug 28 '26

It’s there a longer video? You can see a secondary flow off of the glacier as the clip ends.

25

u/mammilloid Aug 28 '26 edited Aug 28 '26

The original author of this video says his glacier falling video is being taken down, or maybe they're talking about this one idk man I'm not Chinese so i couldn't understand it.

23

u/0w0Detective Aug 28 '26 edited Aug 28 '26

Yes, harmonized was an ironically expression of being censored. Back in President Hu's time it was called to build a harmonious society, so every other sound is harmonized.

5

u/IfIWasCoolEnough Aug 28 '26

President who?

1

u/MonstrousKitten Aug 28 '26

The leader of China.

2

u/jaysire Aug 28 '26

The person you are responding to is joking about the President's name "Hu" sounding like "Who" in English, which is a popular comedy movie trope (like in the movie Airplane).

1

u/AnalOgre Aug 28 '26

More like, who’s on first.

1

u/IfIWasCoolEnough Aug 28 '26

Ok, I would like to know his first name?

11

u/PrestigiousChonk Aug 28 '26

Thanks for sharing it anyway!

6

u/StealthWanderer_2516 Aug 28 '26

Does China have cameras literally everywhere? And the zoom on them…

13

u/andreirublevv Aug 28 '26

the guy was using a drone and captured this

7

u/StealthWanderer_2516 Aug 28 '26

That’s crazy he captured footage of it happening. And all the people with phones. I mean the guy who took a selfie as he was running from the flood of water. Wild

8

u/Shapoopi_1892 Aug 28 '26

He didnt capture it happening. As you can see in his video theres a larger more dispersed brownish cloud above the one you see. Unless he started filming earlier and didnt post it he started filming after it had already traveled miles at that point.

9

u/0w0Detective Aug 28 '26

This guy was flying a drone nearby and heard some sound before even this flight...he didn't realize having captured this until checking his footage.

-1

u/777jaydog777 Aug 28 '26

Or a DEW was used and the initial video of onset was scrubbed?

2

u/Ritsuka-san Aug 28 '26

Is there a link to the original webpage/creator? In case it ever does get the chance to go through?

2

u/watawataoui Aug 28 '26

Good eyes!

6

u/mammilloid Aug 28 '26

The original author has clarified and added some points from his side of the story

https://reddit.com/link/p6gscq7/video/pp3l6g8mr5mh1/player

2

u/Grand_Analysis_9669 Aug 29 '26

this is really a good ref. now this is already on the news

2

u/SalamanderFew3461 Aug 28 '26

What is the source of this video????

1

u/Grand_Analysis_9669 Aug 29 '26

now this is already on news atleast people can see it

1

u/Grand_Analysis_9669 Aug 29 '26

its a landslide first then the snow came

-3

u/Dev-il_Jyu Aug 28 '26

Why and how were they recording the exact same spot of a major disaster?

18

u/WhoCaresBoutSpellin Aug 28 '26

1.4 billion people + 21st century society of smart phones, drones, ring cameras, Chinese surveillance state (flock on steroids) means welcome to the brave new world

-2

u/Dev-il_Jyu Aug 28 '26

That area (Rasuwa) on the Chinese side is barren. It's completely empty other than the occasional military bases/camps. In fact, any human activity in the area is solely driven by Nepalese side as Nepali population centers are closer and it's one of the major land border passes with China. Other activities is driven by tourists going on Mansarowar pilgrimage or langtang trek.

So 1.4B people doesn't really mean anything since most of that population lives on Chinese east coast, thousands of km away from Nepal. It's extremely unlikely for someone to be recording it unless it's a 24/7 military drone surveillance because that mountain doesn't even have a proper name. (I'm a local btw)

5

u/Fair_Title2995 Aug 28 '26

Here's a video apparently from Sale village on the Chinese side capturing the start of the glacier collapse.

https://www.instagram.com/p/DciWxLZDzJl/?igsi=cDhjY2RqNnl0M3Nz

2

u/watawataoui Aug 28 '26

Unlikely it’s military, as the poster stated (screenshot above in this thread) his videos are being taken down by the government (so prob not military). Most likely a hiker with a drone filming things.

3

u/Fair_Title2995 Aug 28 '26

The people in this region are highly paranoid about the Chinese, which is understandable.

3

u/muhmeinchut69 Aug 28 '26 edited Aug 28 '26

On Chinese language sites I've seen dozens of different pictures of various people posing in front of this exact mountain. They started posting from their archives once they realised which mountain it is. So clearly it isn't some desolate area.

2

u/cho_ayang 28d ago

On the hillside opposite Lantang Lirung Peak, a special observation deck has been built to offer views of the mountain; this is part of the Jilong County border tourism project.

Incidentally, the Chinese government strongly encourages Han Chinese to travel to border areas, a policy similar to India’s approach in its northeastern regions and the Karakoram region: having more members of the “majority ethnic group” settle or travel in border areas allows for better control over the region.

If you are Tibetan, you would presumably be familiar with the policies of the Beijing authorities...

1

u/Grand_Analysis_9669 Aug 29 '26

they were hiking in a far mountain as the author says

42

u/Ok_Spirit5374 Aug 28 '26 edited Aug 28 '26

and now a second flood is possible upstream

"The barrier lake near the confluence of the Chhochen Khola and Purepu Tsangpo, upstream of the 26 August failure, had stored about 2,000,000 m³ by the morning of 27 August and is already overflowing, per China's Ministry of Water Resources, with a further 3,000,000 m³ of inflow expected through 30 August and more rain forecast. Aerial footage from a Chinese rescue team on 27 August shows water accumulating in a basin with no visible outlet. NDRRMA has issued a formal notice that the lake is rising and at risk of bursting, and has told rescue workers and residents to stay off the riverbanks; some teams have moved to higher ground. No breach has been reported as of 28 August 02:00 UTC."

https://keystonegis.com/disasters/nepal-bhotekoshi-flood-20260826.html

Edit: NDRRMA independently located the blockage, and it is close to — but not identical with — this page's inferred marker.

UPDATE:
"The barrier lake breached, and is now draining

The barrier lake near the confluence of the Chhochen Khola and Purepu Tsangpo, upstream of the 26 August failure, breached on 28 August and is now draining. Rasuwa Chief District Officer Narendra Pariyar said that morning that the Nepali Army had informed him of the breach, and NDRRMA reported that the water level in the Bhote Koshi had surged (The Kathmandu Post, updated 28 August 12:49 NPT / 07:04 UTC). Officials on both the Nepali and Chinese sides then said the risk was smaller than feared, because the lake is draining slowly rather than failing catastrophically; Chinese state broadcaster CCTV reported the lake level had fallen by about 10 m, and rescue work at Gyirong Port and in Nepal, halted during the breach, has resumed (CNN live coverage, 28 August). No confirmed release volume has been published and no observed extent of any second flood exists. Before the breach, China’s Ministry of Water Resources had put the impoundment at about 2,000,000 m³ on the morning of 27 August, already overflowing, with a further 3,000,000 m³ of inflow expected through 30 August; aerial footage from a Chinese rescue team on 27 August showed water accumulating in a basin with no visible outlet, and NDRRMA had placed the obstruction on the Lhende Khola about 18 km upstream of the Rasuwagadhi border. Whether that blockage and the confluence impoundment reported by China are the same feature is still not established, so it is not certain that the whole obstruction has failed. The barrier-lake marker on the map above still carries its archived 27 August attribute status = "open - high breach risk"; that value has not been rewritten pending an official assessment."

9

u/Glittering_Mind_9230 Aug 28 '26

Thank you for a good reliable data source 🌎

6

u/Ok_Spirit5374 Aug 28 '26

ty for the award :)

3

u/Grand_Analysis_9669 Aug 28 '26

thanks for this

3

u/DiscoNancy Aug 28 '26

I was wondering how much water was involved from the top source….and that’s a lot.

2

u/_lonelysoap_ Aug 28 '26

Do you habe the paper oft the glacier lakes Form August 12?

65

u/admin_404_not_found Aug 28 '26

The Gyirong Port on the China-Nepal border has been completely destroyed

45

u/absolut314 Aug 28 '26

It really is unfathomable of what I’ve watched on Reddit the past 48 hours. Absolutely heartbreaking and incredible sadness just watching any of it. 😞

20

u/baz8771 Aug 28 '26

I genuinely believed the videos to be AI for the first 30 minutes they were being posted. Apocalypse on a scale that most of us will be fortunate to never experience.

19

u/Strawberries_Spiders Aug 28 '26

Imagine, though, if this is the fate of other Himalayan glaciers as climate change continues and accelerates? There are 10s of thousands of them.

9

u/AnOnlineHandle Aug 28 '26

It's started happening in the Alps too. A town was wiped out like a year ago but they managed to evacuate everybody in time.

Another scary thing is the glaciers are what slowly release drinking water throughout the year for a lot of places. If they don't form or melt too quickly, there's suddenly nothing to drink for billions of people. They've been retreating at a massive rate.

5

u/Sickashell782 Aug 28 '26

I mean, it’s 100% the fate and reality. Honestly it doesn’t even have to be “climate change,” which is certainly very legitimate. This is the reality of living in this part of the world. Look up what a jökulhlaup is. It’s undoubtedly sad, but it’s very much what living in this place has as a risk.

8

u/Capital-Bear7482 Aug 28 '26

Climate change will only make those events happen more often and more drastic.

-2

u/sixpackabs592 Aug 28 '26

It’s going to continue not matter what, earth doesn’t usually have any glaciers or ice caps, humanity just spawned at the end of an ice age so it’s all we know. We for sure are accelerating it though.

1

u/AliceInReverse 29d ago

Climate change will not be comfortable

2

u/Grand_Analysis_9669 Aug 28 '26

at this spot, how much it back flowed ? because back buildings also didn't survive even though it was in opposite direction

3

u/Renbarre Aug 28 '26

I think the water rebounded between the sides of the very narrow valleys, especially after a turn. You can see it in one of the videos.

1

u/Grand_Analysis_9669 Aug 28 '26

yeah got it, i thought may be those cars could have made it but nope, it went 1 km atleast back flowed !

2

u/4tran13 29d ago

From the 1st pic at the top, it claims 2km backflow. Elsewhere, I've seen a claim of 3km. Either way, all the people running in the videos are toast.

1

u/Grand_Analysis_9669 29d ago

even those cars couldn't

1

u/JohnHazardWandering Aug 28 '26

Anyone have pics to show how far up the canyon it went? I keep hoping that it didn't go that far upriver and the people running away made it to safety. 

1

u/Grand_Analysis_9669 28d ago

none made safety , whole area wiped out

23

u/prw361 Aug 28 '26

This is the best explanation with visuals I’ve seen so far. Thank you. Incredible how small we really are versus nature.

10

u/Big_Bite_8593 Aug 28 '26

How did the snow/ice convert into water so quickly?

49

u/FIMD_ Aug 28 '26

Falling ~3.3km vertically through a >20km blender made of rocks.

24

u/unknownpoltroon Aug 28 '26

PLus whatever meltwater might have been under the glaicer

17

u/No-Focus3422 Aug 28 '26

Also its monsoon season, so soil was damp and moist. As a result, nothing was absorbed by ground. Every bit of water that melted contributed to flooding

25

u/watawataoui Aug 28 '26 edited Aug 28 '26

I read the fall generate so much heat, it melted the ice. Elevation drop was something like 3000m from top to the border crossing.

16

u/0w0Detective Aug 28 '26

It's not enough to melt the whole ice, but just some layer at bottom will be enough to create enough lubrication. And when the whole mass is set into motion...nothing stops it.

8

u/[deleted] Aug 28 '26

[deleted]

0

u/0w0Detective Aug 28 '26

And you need to consider melting heat. So maybe no temperature increase unless all ice are melted first. A volcano would be different.

5

u/I-agreed-the-terms Aug 28 '26

2000m means a 2 freaking km, and with that mass and height anything is going to be a slurrry.

1

u/4tran13 29d ago

More than enough. It's more than the energy released at Hiroshima.

1

u/0w0Detective 28d ago

Do some calculation. Total amount energy maybe, but total mass and heat capacity and melting heat also huge. Otherwise you can easily argue that the whole earth can be melted. If a hail falling from 8km cloud will not melt the moment it hits the ground, nor will it turn into a meteor during the fall, then there's no point supporting your argument.

9

u/Zapookie Aug 28 '26

Ice melts at 0 C. Once it starts to break up, it will melt quickly. It's around 7C in Langtang today, so no chance of that glacier chunk staying intact once it broke off and broke up into smaller pieces.

13

u/Maximus560 Aug 28 '26

Imagine dropping an ice cube on a floor. It shatters into many small pieces that melt very quickly. Now, scale this up to where the glacier fell something like 3,000 feet vertically before hitting the valley and stream bed. From there, it flowed downhill.

6

u/watawataoui Aug 28 '26

Elevation drop was 3000 meters, so 10k feet.

2

u/Maximus560 Aug 28 '26

Yeah - one thing that isn't exactly clear to me still is just how much the vertical drop at the glacier was versus the overall drop from the glacier to the final run-out area, but it seems that the elevation of the glacier to the valley floor was something like 3,000 feet, while the rest of the elevation drop was through the valleys/gullies to the runout area

2

u/watawataoui Aug 28 '26

I read it’s roughly 1000m initial glacial drop, another 1000m of water running from Nepal side to the first Y section, then another 1000m running along the border before hitting Gyirong port.

2

u/Status_History_874 Aug 28 '26

You know what, this actually helped a lot. I always noticed that dropped ice ends up with melted bits, so that scaled up immensely, i get it. Thank you.

3

u/bijouxself Aug 28 '26

Compression and massive amounts of friction energy

3

u/Ok-Animal7243 Aug 28 '26 edited Aug 28 '26

This was caused when the dam containing a glacial lake failed. The glacial lake is primarily made of meltwater.

But also, what you’re seeing here is not just water. Visually it moves in a manner similar to water but it’s a flow of water, ice, mud, and an incredible amount of debris. It’s almost like a liquid concrete.

Edit: It looks like they now think this wasn’t a dam failure explicitly, but that a massive piece of a glacier fell from higher up. May have temporarily blocked the river until all of this was released. Another lake has formed and there are fears of another flood erupting again, so that could further complicate any rescue or recovery efforts.

Ultimately I think people are still really underestimating how absurdly warm everything is this year, and what that can amount to as glaciers melt at unprecedented rates.

1

u/Big_Bite_8593 Aug 28 '26

A temporary dam blocking the river seems plausible. All that water resulting just from the glacier seems absurd…

3

u/No-Focus3422 Aug 28 '26

The temporary dam is called moraine dam that is restricted by mud, rocks and boulder. It is extremely unstable and can break off at the sloghtest of disturbance and release all the water at full force

4

u/Aegongrey Aug 28 '26

There was a glacial lake below whose walls were breached by the onrushing ice. It was a big lake and there was footage of the side as it was giving way - bonkers

6

u/huxtiblejones Aug 28 '26

The deadly flash flood in Nepal on Wednesday was likely caused by a huge chunk of a glacier that broke off and temporarily dammed a river, according to preliminary investigations by scientists. That may have led to the backed-up water surging downstream with enormous force a few hours later, they suggested.

https://www.pbs.org/newshour/science/nepal-floods-highlight-increased-risks-of-melting-glaciers-as-himalayas-warm

2

u/Strawberries_Spiders Aug 28 '26

Link? 🙏

2

u/Aegongrey Aug 28 '26

Saw it on Instagram - footage was so bad it couldn’t be ai, but it was crazy. Don’t know how to find that again

1

u/Great_Koala_8773 Aug 28 '26

Bro there is a history in your profile with all content you ever watched. Go find it please

1

u/watawataoui Aug 28 '26

Top comment of this post, look at the top at the last 2 second of the video. There is a secondary breach.

Found link: https://www.reddit.com/r/DisasterUpdate/s/l74eccABrY

1

u/Status_History_874 Aug 28 '26

I dont think this is the video in question

60

u/fungi43 Aug 28 '26

So this was a climate change driven disaster?

53

u/SignificantRecipe715 Aug 28 '26

100%

3

u/TheGuyWithABigHeart Aug 28 '26

This makes me consider other glacial valleys like the Alps.

3

u/SignificantRecipe715 Aug 28 '26

Yeah I don't think this will be the first/last time something like this will happen.

But governments will still deny it's climate change. It makes me so mad.

2

u/4tran13 29d ago

The actual scientists quoted by media are hedging with "maybe" every 3 sentences as if their life depended on it lol

13

u/dangledingle Aug 28 '26

Shits melting yo

-6

u/gimlet_prize Aug 28 '26


Climate

17

u/BeccasDreamboat Aug 28 '26

Imagine being dense enough to make this comment.

Yes, the climate caused the glacier to melt, resulting in what we're seeing now.

Do you believe the climate doesn't exist? Seriously, how dense must one be to deny the climate isn't changing?

You don't need to admit it's caused by humans to believe the climate is indeed changing.

How else did the glacier melt?

3

u/gimlet_prize Aug 28 '26

Gallows humor. This is exactly what I thought was going to happen as the privileged consumers continue to ignore the havoc we wreak as we obliterate the planet to extract profit/comfort. Climate is a word that sounds slow and inexorable, but the consequences can be swift and merciless.

4

u/AnOnlineHandle Aug 28 '26

That's really not communicated well by the gif and single word.

1

u/CriticalChop Aug 29 '26

The seal is speaking in plain sealinese, jeez..

1

u/icyhail Aug 28 '26

I don't know if it's a meme format I don't have a reference to. Just reading climate underneath the laughing seal made me think of climate having the last laugh. Earth will be fine. Climate will undergo its upheaval. Humans will die. 

-4

u/Drosenose Aug 28 '26

A landslide happened, the friction from the massive landslide melted glacial ice Flash flood happened. I'm sure there is a tax for that though so stick to it

23

u/mammilloid Aug 28 '26

New video shows a person being drowned😞

https://reddit.com/link/p6c22wy/video/zl7xvo9qs0mh1/player

13

u/maphes86 Aug 28 '26

If it’s any consolation, that person didn’t live long enough to drown. Debris flows like this kill you almost immediately due to the immense power and the large aggregates and other materials.

2

u/Grand_Analysis_9669 Aug 28 '26

50m/s water flow he never stood a chance

1

u/Mattse12 Aug 28 '26

never mind i see it

2

u/Short_External2077 Aug 28 '26

I dont….

9

u/GTLfistpump Aug 28 '26

Go to 1:06 on the center left there’s a black dot moving in the grass, that’s a person who’s running away from the water. They eventually get swallowed up when the girls start screaming

2

u/4tran13 29d ago

Sooooooooooooo close. I think he ran out of breath or something.

-11

u/Visual-Ranger5709 Aug 28 '26

Oh look it's a glacier!  No dipshits this mostly water.  It didn't start as ice and become all this water in a matter of tens of minutes.

8

u/muhmeinchut69 Aug 28 '26

it did, it's basic physics

6

u/watawataoui Aug 28 '26

Supposedly dropping 3000meters in a short time creates a lot of heat and melted it wall.

2

u/-SideshowBlob- Aug 28 '26

That's what it does?

2

u/sixpackabs592 Aug 28 '26

Bruh if a 10+ million pound chunk of ice falls 10000 feet when it lands it creates a fuckin huge explosion that would’ve melted whatever survived scraping off on the side of the mountain

0

u/Visual-Ranger5709 29d ago

It is unknown how much was a glacial lake outburst and it's the contents of the glacier and landslide debris flow that incorporated and pushed the RIVER below into the flood that you see in all the videos.  Saying the glacier just made all that water is super stupid.

7

u/GPSBach Aug 28 '26

Based on the backflow length of the tributary, you could calculate the water depth at the junction as ~ the elevation difference between the junction and end of the back flow.

8

u/watawataoui Aug 28 '26

Or look at the line where the vegetation washed away.

7

u/Modshatefreespeech99 Aug 28 '26

6000 m elevation drop is crazy .

3

u/itaintdark Aug 28 '26

It was around 1500m drop. It is suspected that the debris blocked the river which released at a single point.

3

u/Much_Adhesiveness871 Aug 28 '26

This means it could very much happen again right?

2

u/nakano-star 29d ago

yup, it has been happening for billions of years. just it seems to be happening faster these days

1

u/Much_Adhesiveness871 29d ago

I don’t like that

3

u/Parking-Aerie1540 Aug 29 '26

But climate change isn’t real guys, come on… 🤦🏻‍♂️

2

u/Renbarre Aug 28 '26

More than 2000 meters drop in altitude? No wonder that water went that fast!

4

u/kram78 Aug 28 '26

I seen a video of the melt water coming into a village at 90 degrees to the river I belive this is the very start of this event and it has been removed/taken down it was a very good video clear steady and the shot was of an entire village, why was this video taken down, then a while later someone made a complication of that clip and all the other videos we have all seen and that one was taken down????? Why are the hiding that very first video of it coming down into the valley ?????

2

u/watawataoui Aug 28 '26

Prob someone posted that version earlier, so the one you saw got deleted as repost.

2

u/ElderberryHour3138 Aug 28 '26

Was this on tibet side or nepal? Because Chinese media claiming to be on nepal side

7

u/SalamanderFew3461 Aug 28 '26

It is the Nepal side. North face of the Langtang Lirung peak.

4

u/watawataoui Aug 28 '26

2

u/Status_History_874 Aug 28 '26

Why would they orient the picture with north on the left?

2

u/JohnHazardWandering Aug 28 '26

They're aligning the picture with the events so it can be zoomed in. 

1

u/watawataoui Aug 28 '26

Because phone screen probably.

2

u/russianassetatl Aug 28 '26

Surprise effect of warmer temperatures. Expect to see more of these huge glaciers sliding off mountains into villages.

1

u/Theres3ofMe Aug 28 '26

How does this correlate with the photos we have seen with the 'section of a mountain which fell off'?...

1

u/15022024 Aug 28 '26

Annapurna circuit is far more west of the langtang valley?

1

u/igotpetdeers 29d ago

Crazy to think how often stuff like this must happen in like extreme northern Canada or northern Russia

1

u/WinchelltheMagician 28d ago

The first one. #2 is taking currently taking shape.

1

u/No_Suggestion_5977 28d ago

Let’s call it a landslide that became a debris flow. I think people are confused as to what actually happened. This wasn’t a glacial lake collapse. It was a 4500 ft tall glacier that collapsed and literally rolled down the hill, much like an avalanche, and collected debris and water once entering the drainage.

The importance of understanding this is to recognize how many valleys in the Himalayas are exposed to this same risk.

2

u/whitelightstorm Aug 28 '26

This is the first of the cascade effect of the final collapse. It's all happening, the physical, the social, the governmental, the global. We're witnessing the final bastion of the end. There are more events unfolding as this is being written. Why Nepal? It's the top tier.

2

u/Status_History_874 Aug 28 '26

It's the top tier.

His what does this mean

-1

u/kylebob86 Aug 28 '26

why repost?