What happens before a fuse blows?

Could you elaborate on the process that precedes the blowing of a fuse? What specific conditions or occurrences must take place in order for the fuse to reach its breaking point? Are there any warning signs or indicators that suggest a fuse is about to blow? Additionally, how does the fuse itself respond to these conditions, and what factors influence its ability to withstand them before ultimately failing? Understanding these details would provide valuable insight into the mechanisms at play before a fuse blows.