If you are polymorphed into a fire elemental, there should be a way to burn through a closed door. Probably via force-fighting the door while bare-handed.

The reason for this is since a fire elemental lacks arms and legs to open or kick the door with, a closed door is an impassible obstacle.

Fire/water elementals are not only uninjured by fire/rust traps, but are strengthened or healed by them.

Fire elementals and vortices should have a light radius of 2, not 1.