Notwithstanding the foregoing, wherever, in the judgment of the Building Inspector, or other designated officer, a catastrophe such as fire, flood, tornado, or other similar disaster occurs which causes a residential structure to become unfit for human habitation, the Building Inspector shall have the power and right to issue a temporary operating permit so that a house trailer may be placed on the land for a period not to exceed 12 months from the date of its issuance. Any extension beyond said twelve-month period shall require Board approval in accordance with the procedures outlined above.