“Disaster” means the occurrence or imminent threat of widespread or severe damage, injury or loss of life or property resulting from any natural or nonmilitary manmade cause including, but not limited to, fire, flood, earthquake, landslide, mud slide, wind driven water, weather condition, volcanic activity, epidemic, air contamination, blight, infestation, explosion, riot, equipment failure, or shortage of food, water, fuel or clothing, or the release of petroleum products or a hazardous substance requiring prompt action to avert environmental danger or damage, or civil defense measures to mitigate or respond to acts of war toward the city or the United States of America by any enemy or the agents thereof.

“Disaster emergency” means the condition declared by proclamation of the mayor to designate the imminence or occurrence of a disaster. (Prior code § 11.50.010)