Whenever any nuisance as defined herein constitutes an immediate hazard to life, health or property and, in the opinion of the City Manager or his/her designee, abatement must be undertaken immediately, the City Manager may abate or cause to be abated all or any portion of the nuisance as may be necessary to protect life, health or property after giving such notice to the parties concerned as the circumstances will permit or without any notice whatever when, in the opinion of the City Manager or designee, immediate action is necessary.