And in the graveyard tunnel, which was full of fire (because I had to run away from the Skeletal Scorcher fight), I came back with reinforcements and had Jahan cast Rain. It looked like it was clear, but I ran in got set on fire, combat started, and I died.

After reloading I tried the rain thing again, and I think I figured out what happened: the big problem here is that we're getting burned by STEAM CLOUDS, which are nearly invisible. I know I've burned myself on steam a few times thinking it was just water. Make the steam clouds more visible, please.