The regulations provided for in this chapter shall be made in accordance with a comprehensive plan and shall be designed to:
1. Lessen congestion in the streets;2. Provide for emergency management. "Emergency management" means a comprehensive integrated system at all levels of government and in the private sector which provides for the development and maintenance of an effective capability to mitigate, prepare for, respond to, and recover from known and unforeseen hazards or situations, caused by an act of nature or man, which may threaten, injure, damage, or destroy lives, property, or our environment;3. Promote health and the general welfare;4. Provide adequate light and air;5. Prevent the overcrowding of land;6. Avoid undue concentration of population; and7. Facilitate adequate provisions for transportation, water, sewage, schools, parks, and other public requirements.The regulations shall be made with reasonable consideration as to the character of each district and its peculiar suitability for particular uses with a view to conserving the value of buildings and encouraging the most appropriate use of land throughout the city. The comprehensive plan shall be a statement in documented text setting forth explicit goals, objectives, policies, and standards of the jurisdiction to guide public and private development within its control.