In cases of emergency, where delay in abatement required to complete the notice and procedure requirements set forth in §§ 137-18 and 137-19 above will permit a continuing nuisance to unreasonably endanger public health, safety or welfare, the City Council may order summary enforcement and abate the nuisance. To proceed with summary enforcement, the officer charged with enforcement shall determine that a public nuisance exists or is being maintained on the premises in the City and that delay in abatement of the nuisance will unreasonably endanger public health, safety or welfare. The enforcement officer shall notify in writing the occupant or owner of the premises of the nature of the nuisance and of the City's intention to seek summary enforcement and the time and place of the Council meeting to consider the question of summary enforcement. The City Council shall determine whether or not the condition identified in the notice to the owner or occupant is a nuisance, whether public health, safety or welfare will be unreasonably endangered by delay in abatement required to complete the procedure set forth in § 137-18 above, and may order that such nuisance be immediately terminated or abated. If the nuisance is not immediately terminated or abated, the City Council may order summary enforcement and abate the nuisance.