The Derry Borough Council may temporarily waive some of the regulations of this chapter during a declared local emergency. Any structure suitable for a housing facility in the case of emergency, necessity, or disaster may be used for temporary housing or shelter in order to alleviate undue hardship that may be incurred by the above conditions, and that such use of temporary housing shall not exceed a period of more than 90 days from the date of same. If, for any of the above reasons, the Borough Council finds that the ninety-day period is not sufficient, then the emergency regulations may be extended for additional ninety-day period.