Tex. Prop. Code § 92.062

If a rental premises is, as a practical matter, totally unusable for residential purposes as a result of a natural disaster such as a hurricane, tornado, flood, extended freeze, or widespread windstorm, a landlord that allows a tenant to move to another rental unit owned by the landlord may not require the tenant to execute a lease for a term longer than the term remaining on the tenant's lease on the date the premises was rendered unusable as a result of the natural disaster.