Escaping underground: the eerie new age of bushfire bunkers — With concrete walls, flame-proof doors and wine racks, bushfire bunkers offer the promise of safety, at least for those who can afford …::With concrete walls, flame-proof doors and wine racks, bushfire bunkers offer the promise of safety - at least for those who can afford them
Different requirements though, you skip a tornado by going underground and waiting for it to pass over you.
In a wild fire, extreme heat and lack of oxygen can be a concern, so a simply tornado shelter wouldn’t cut it.