This happened on August 23 at Piz Cengalo near Bondo, Switzerland.
>3 mio m3 rock go downhill
>8 people missing, all hikers
https://www.youtube.com/watch?v=tsrL1p5oxDA
https://www.youtube.com/watch?v=uma5t46IeVU

fun fact, 2 days earlier this happened
https://www.youtube.com/watch?v=RYRfPrhCWzs
https://www.youtube.com/watch?v=rjy4JTbQqXQ
Warning sings where posted all over the place in 4 different languages, and hiking trails where closed. The mountain is a huge geological risk and under constant survey. Every local will tell you not to go there,

Also
>lahar hits village downriver
https://www.youtube.com/watch?v=wtShEne17T0