When necessary for the preservation of the public peace, health and welfare or safety, the Council, by an affirmative vote of the majority of the members present, may adopt an emergency ordinance which shall set forth and define the specific facts necessitating the emergency. Such emergency ordinances shall require no public hearings and shall take effect at the time indicated therein. Emergency ordinances shall remain in effect for the duration of such emergency. Emergency ordinances shall be published as other ordinances after passage.