What is the problem with avalanches?

I'm curious to understand the issues surrounding avalanches. Could you please elaborate on the challenges they pose? Are they solely natural disasters, or are there other factors involved? How do they impact the surrounding environments and communities? Are there any preventive measures or strategies that can be employed to mitigate their effects? I'm particularly interested in the financial implications, if any, associated with avalanches. Could you also discuss any potential opportunities that might arise in the wake of such events? It would be helpful to gain a comprehensive understanding of the issue.