California Code, Health and Safety Code - HSC § 14931

(a) Require and provide for the removal of grass, weeds, or other obstructions from the sidewalks, parkings, or streets and make the cost of removal a lien upon the abutting property.

(b) Require or provide for the removal from property, lands, or lots of all weeds, rubbish, or other material dangerous or injurious to neighboring property or the health or welfare of residents of the vicinity and make the cost of removal a lien upon the property.

(c) Provide for the enforcement of the lien by the sale of the property or otherwise.