Notwithstanding the provision of this Division or any other provision of law, if the Health Officer finds that any person is causing or contributing to air pollution and that such pollution creates an emergency which requires immediate action to protect the public health or safety, he/she shall order such person to reduce or discontinue the air pollution immediately. Such order shall be complied with immediately. Upon issuance of any such order, the Health Officer, if requested by the person so ordered, shall fix a time and place for a hearing before the Department. The hearing shall be held within a reasonable time thereafter. Not more than twenty-four (24) hours after the conclusion of such a hearing, and without adjournment thereof, the order shall be affirmed, modified or set aside.