Phone number and email access, if you can regain access to them.

It is definitely a good idea to plan in advance and set up a recovery contact: https://support.apple.com/en-us/102641

But email access is protected by MFA based on your destroyed device. Recovery codes are also stored in the same destroyed building.

	▲	brookst 10 minutes ago \| parent \| next [-]
		I said “if” for email, which I at least have recovery codes stored with someone trusted. And that link is to recovery contacts, not codes. If you’re willing to trust one person you can get back into your Apple account after a disaster.
	▲	kijin 9 hours ago \| parent \| prev [-]
		You can get back your phone number once you have a photo ID and buy a new phone. Then you should hope that your service providers aren't secure enough to have disabled SMS-based account recovery.