The party put forth a sustained assault on the second level of Temple of Elemental Evil.
They slew many evil humanoids in the service of the Temple of Water—and Uvogin earned the name Trollhair from the temple’s terrified bugbear guards after he waded through their ranks wearing the hair of Oohlgrist, the hideous troll-wife queen. Despite steady progress, the party has not yet found the water temple’s altar or any of the evil clerics that serve it.
Careful exploration revealed that the Temple of Fire occupies the same level as the Temple of Water. The two sides do not appear to be in open conflict.