Thanks, I see that Lahars are technically associated with volcanoes as another comment noted. They have a variety of causes of which glacial collapse is one. [0] The term jökulhlaup describes a flood originating from a glacier, for example draining of a glacial lake. [1] It now seems the Nepali flood was triggered by a landslide onto a glacier.

As a practical matter the effects are pretty similar. Rainier has had lahars and jökulhlaups in the past.

[0] https://en.wikipedia.org/wiki/Lahar

[1] https://en.wikipedia.org/wiki/J%C3%B6kulhlaup

I can't access the OP article at the moment, but there's a diagram of the the chain of events that caused the disaster here [1].

I believe Lahars are specifically volcanic, this would be better described as a combination flood and landslide at the same time.

[1] https://www.bbc.com/news/live/c6y8mjmnpxv0t?post=asset%3Ac6b...