I'm not wild about the way elemental damage works outside of turn-based combat.
Outside of combat there is practically no time to react. I accidentally stepped on the remnants of a fiery surface (that had been mostly doused with water) during the tutorial dungeon and before I could even start to react my character had taken several ticks of fire damage and died.
Meanwhile (during combat), if you run onto a fiery surface you have all the time in the world to apply healing, put the fire out, etc.. it's all taken care of during turns.
I almost feel like any time a character starts to take any kind of damage, the game should go into its turn-based mode. Or maybe at least make it an optional setting. "Enter turn-based mode on receipt of damage, yes/no"