The Council finds that uncontrolled or high weeds, brush, plant material or other items prohibited under Sections 57.4906.5.1 through 57.4906.5.1.1.9 increase the danger of fire and thus constitute a public nuisance. If such condition exists, the Los Angeles Fire Department shall give notice to the owner of record to abate the nuisance within 15 days. The notice shall be either posted on the parcel or mailed to the owner, or both.