Does an Avalanche Count as a Non-Water Flood?

So that was the kingston coal plant coal fly ash disaster i have a taxonomical question for you at this point okay does an avalanche count as a non-water flood. What category does an avalanche get or like a landslide a landslide? I guess it matters like the liquid content well maybe not liquid content because i've got one coming up that's not liquid so you mentioned pyrocla i don't know the word what is the wordpyroclastic pyroclastic is there an elo pyro clastic flow yeah  Ask a ladriel from that lord of the rings show because she's more familiar with how to survive one of those than anyone.