The lawsuit was filed in Houston federal court and claims TDCJ is housing inmates in brutal conditions that violate constitutional rights. Wallace Pack Unit in Navasota, Texas, lacks air-conditioning, and summer temperatures can send living conditions into scorching temperatures.

The groups bringing the suit include the Texas Civil Rights Project, and the University of Texas School of Law’s Civil Rights Clinic. The suit was filed on behalf of four prisoners at Wallace Pack Unit in Navasota. It also names Wallace Pack Unit senior warden Roberto Herrera as a defendant.

Wallace Pack Unit is one of TDCJ’s medical and facilities for elderly, and houses a large population of inmates over the age of 65. The goal of the lawsuit is for the court to require that the heat index inside the unit should not be any more than 88 degrees.

Texas law mandates county jails be climate-controlled, but the law does not apply to TDCJ prisons.

No hearing is currently set for the suit.