Can we get an Official clarification on housing Demolish timer (45 or 90?)

[Malicewolf]

But, But, what happens if my country goes to nuclear war with Russia. And I have to live in a vault for 5 years or so until the fallout goes away? That means I don't get to keep my house when I come back above ground?!?!? This is so unfair!!!! I live in America and the threat of another Cold War is very real.

Please take my like sir. My sympathy's go out to you :P