Paper can be really fragile, and all it takes is a tear or water spill or defacing to deny you access to your BTC forever.
So, you should make a second copy of your seed phrase that is identical to the first, and store it on a different place from the first seed so that they both cannot go down together except in extreme circumstances like a natural disaster.
The second seed pharse backup besides being stored on paper, it is a good idea to prepare another place to store such as in a metal mold that can withstand a fire.
As for other natural disasters, they are of course beyond our reach as humans.