Cal. Civ. Code § 43-32-19

A tenant may terminate a lease before the end of the term if:
(1) The landlord does not, within a reasonable time after written request, fulfill obligations, if any, as to placing and securing the tenant in quiet possession of the premises or putting the premises into good condition or repairing the same;
(2) The greater part of the leased premises or that part which was, and which the landlord had at the time of leasing, reason to believe was the material inducement to the tenant to enter into the lease, is destroyed, from any other cause than the ordinary negligence of the tenant; or
(3) The tenant meets the provisions of § 43-32-19.1.