Cal. Gov't Code § 8589.45
(a) In every lease or rental agreement for residential property entered into on or after July 1, 2018, the owner or person offering the property for rent shall disclose to a tenant, in no smaller than eight-point type, the following:
(1) That the property is located in a special flood hazard area or an area of potential flooding, if the owner has actual knowledge of that fact. For purposes of this section, “actual knowledge” includes the following: