A pipeline fire that burned in a Houston suburb for four days finally went out Thursday as authorities announced a criminal investigation into the blaze that had roared into a towering flame, forcing neighborhoods to evacuate and melting parts of nearby cars.

Many residents who evacuated near the still-burning Deer Park pipeline fire have yet to return, leaving some wondering when they can finally go back home.

The pipeline’s owner is “the same company that got $2.4 billion richer when Texans froze to death during Uri,” one activist points out.