Texas has appealed a federal court's ruling that would require all state prisons to be air conditioned by the end of 2029.

The state's attorneys also asked U.S. District Judge Robert Pitman to suspend his order during the appeal process, citing old prison designs and a high inmate population as "obstacles" to completing the order.

The Texas Department of Criminal Justice said installing air conditioning systemwide, but the court-imposed timeline of 39 months was not achievable.