Check with your insurance; they may replace the whole safe. Also, check with the safe manufacturer. Considering what's happening, they may have a hurricane program.
I didn't get water in my safe but it smelled from a house fire. The manufacturer didn't have interior "kits" and said the way they're built it's not feasible to replace the interior... I couldn't understand how that would be the case but, regardless, I got that in writing and added the loss to my claim. I got full reimbursement, kept the money and "cleaned" it myself. Visually it looks fine. On occasion I think I still smell smoke but it may be a mental thing because it's not just with the safe, it's other areas of the house too. Everybody thinks I'm nuts. I know I am but I still believe I smell smoke odor.