Vital records – need to be originals or copies OK?

I want to put together all my important paperwork in one fireproof, waterproof kind of enclosure. Something for when I have to bug out or evacuate or god forbid, the house burns down…again, (happened once already). Do vital records need to be originals or will copies do? I am thinking things like birth certificates, house title, car titles, marriage license, copies of passports and drivers licenses etc. Do I want to make scans onto a thumb drive too?