I don't think I've seen a snuff film of that scale before. I'm not good with even fictional horror. This may haunt my dreams. For most of the people there was just nothing they could do. But others would have had a chance if they had run perpendicular to the flow and climbed like their life depended on it. I'll try to remember that the next time I'm fleeing in panic from a flash flood.

Looks like a warning siren could have saved some lives. But apparently this was a black swan.

150 confirmed with 47 Americans? Surprising fraction. Mountaineers or that area is popular for some reason?

I have watched a few and they look like the four horsemen TBH.