When I was researching this morning I found papers related to this kind of risk from at least 2000. Given 20 years there could have been things done I think. And there is a lot of settlement on the tops of the ranges in that area too.. Maybe the roads have to be on the river valley, but not everything else. People living there could have been offered alternative land to move out of the path of it.. monitoring and early warning could have been set up.. at the checkpoint, if it had to be there, there could have been a big evacuation tunnel carved into the hillside, or something.. I guess Nepal doesn't have a lot of resources though. The same thing even happened a year ago in the sample place, but at a smaller size https://www.stimson.org/2025/investigating-an-emerging-clima...

So, one of the most notably impacted locations to date has been the Gyirong port border crossing, noted in a couple of my earlier comments. Part of that is due to there being surveillance closed-circuit camera footage available, and there are other areas which would have been similarly affected. A few additional thoughts and facts have come to light:

- The crossing was substantially renovated in January of this year following an earlier flood which washed out the bridge connecting the station (in China) to Nepal.

- The crossing, part of China's Belt and Road Initiative (<https://en.wikipedia.org/wiki/Belt_and_Road_Initiative>), by needs must sit on the principal highway through the region. Which ... follows the river valley. Now, it's possible for that highway to be raised substantially off the valley floor, but consider that "inundations reached heights of 800m (2,600 ft) in a valley some 7km (4.3 mi) from the origin" (<https://www3.nhk.or.jp/nhkworld/en/news/20260827_22/>, via Wikipedia).

- The inundation reached the Gyirong port seven minutes after the initial avalanche. Even with absolutely timely warnings, that is only just barely enough time for a fit person to reach a safe elevation above the port itself. Wikipedia now mentions two people (of apparently hundreds present) being rescued from Gyirong port.

- Early reconnaissance footage above the site of the former Gyirong port shows nothing but bare land. All of the apparently quite substantial structures on the site were simply scrubbed from existence. The forces involved are formidable. <https://www.globaltimes.cn/page/202608/1369215.shtml>

I believe that the end of this video shows post-incident video of the same site, though frankly it's unrecognisable. I'm sure we'll have more definitive evidence soon. <https://www.msn.com/en-ca/video/other/china-video-shows-muds...>.

- The event is, as has been noted, foreseable, but also unprecedented. There are no events of comparable magnitude in the area, despite previous flooding. The likelihood that this week's incident represents a potential new baseline must be considered.

- Debris flows were moving at roughly 50m/s, or 180 kph (about 110 mph). That's not only an absolutely formidable speed, but a formidable force, where kinetic energy = mass * velocity squared.

The only possible safe refuge I could see would be some sort of underground bunker, into which all staff and travelers would have to locate to in a matter of seconds, and then sealed against water intake, this in a busy border crossing with multiple nationalities and languages in a region with a < 70% literacy rate.

And that's for the Gyirong border station itself. Note that that was a Chinese facility, where China is the vastly wealthier and better-resourced partner to Nepal. Nepal's capabilities to effect similar measures at an equivalent facility or in numerous communities throughout the region is quite limited.

Also affected were numerous other facilities, including a shrine (being visited by numerous Hindu pilgrims), apparently utterly destroyed and all present killed, numerous villages, etc. Roads are heavily damaged if present at all, bridges are washed away, and in a region with tens to hundreds of thousands of inhabitants (based on various county/district Wikipedia pages I've examined), a dozen or so rescue helicopters have so far been summoned.

Oh, and a new glacial/debris dam and lake have formed which is feared may pose an additional outburst flood event within days (<https://www.theguardian.com/world/2026/aug/27/nepal-tibet-fl...>).

Flat lowland is great because it's cheap and easy to build on, and not a hassle to actually use.

Ridgelines and slopes are terrible to build on (and often use) because there is little to no actual flat usable area without extensive construction. They also tend to be unstable and slide/erode.

That said, if I was in that area, of course i'd never build/live on anything but the highest ridgeline or slope around.

One of those 'long term/outlier risks cause daily costs' type of things. :s