As used in this chapter, “emergency” means the actual or threatened existence of conditions of disaster or of extreme peril to the safety of persons and property within the city caused by such conditions as air pollution, fire, flood, storm, hazardous materials incident, drought, sudden and severe energy shortage, plant or animal infestations or disease, epidemic, riot, nuclear emergency, earthquake or other conditions, including conditions resulting from war, terrorist acts or imminent threat of war, which conditions are, or are likely to be, beyond the control of the services, personnel, equipment and facilities of this city, requiring the combined forces of other political subdivisions to combat. (Ord. 1560 § 1, 2011: prior code § 2430.1)