Article 575 of Civil Code

1 - If the leased property is totally destroyed during the lease term by an external cause attributable to neither contracting party, the contract shall be dissolved automatically. - If its destruction is partial, or it becomes unfit for obtaining the intended benefit in full, without the lessee having caused this, the lessee may, if the lessor does not restore the leased property to its former condition within an appropriate time, request either a reduction of the rent or rescission of the lease, without prejudice to his right to repair the leased property himself and restore it to its original condition in accordance with Article 573, provided this does not impose an excessive burden on the lessor.