Death of a Propane Salesman (2) - S3-E1
Corrected entry: When Hank and Luanne come out of the store after the explosion, they are right beside each other, yet only Luanne lost her hair.
Death of a Propane Salesman (2) - S3-E1
Corrected entry: Luanne's hair was blown off in the fire, yet she has no burns on her shoulders, around her neck, or anywhere on her arms.
Correction: Hair burns at a lot lower temperature than skin, so it is possible the heat blast was enough to singe the hair away but not enough to damage the skin. We also see when Luanne gets away from the mall, Hank used a fire blanket to cover her. So it could be concluded that he was able to cover enough of her not to get burned but couldn't save her hair.
Correction: This was a conclusion of the previous season's cliffhanger. Hank was on the other side of the store when he smelled the propane, and Buckley and Luanne were closer to the blast. He found her after the explosion, thus her hair was burned but his was not.