Of course! It does lean more on feral Monsters, but is relevant to those that don't quite reach that point, too.

In the case of a Dragon that specializes in fire, prolonged exposure to water can result in their internal body temperature dropping to dangerous levels (causing possible lethargy at best and torpor at worst), especially if their weakpoint is exposed to it at any point, and will actually compromise their immune system to illnesses - especially pneumonia, both in their respiratory lungs as well as their specialized breath sacs. It would take a great deal of warming back up and energy to regulate them again.