I've had a snake lost in transit once before, and after worrying for 24 hours mainly due to the extreme temperatures it was facing, everything ended up being just fine. Snakes are sturdy creatures, as long as you packed the fire well, rely on your packing, trust fedex to pick up the slack in finding the package, and see what happens. It's not a common instance to run into, but its not unheard of by anymeans. These things happen, just hang in there!