When you review your insurance policies have you checked to see if you have zombie or alien abduction coverage? I doubt it.
Your insurance company may not even have policies to cover such incidents.
Here are some links for comparison shopping:
https://www.uigusa.com/products/zombie/
https://www.insuranks.com/zombie-apocalypse-insurance
https://pablobeachinsurance.com/surviving-zombie-apocalypse-theres-insurance/
Here is an article on some other more esoteric insurance policies for your needs.
It is always better to be safe than sorry.