Bitcoin stands the chance of surviving any natural disaster that will affect physical assets which is on a landed property. Bitcoin is digital and not only one person run the network. It comprises of many nodes from different part of the world. Therefore, bitcoin will definitely survive as long as the world wouldn't come to an end.

What you should think of is the people holding their bitcoin in their self custody, because if they die in natural disaster, without anyone knowing how to access their bitcoin, that is when their bitcoin is lost. You can have access to your bitcoin in any part of the world as long as a have an internet and your seed phrase with you.