Kendra's skin felt dry. Her face was flushed. She was sweating despite the air conditioning. The bell rang and she bolted from her desk, the first member of the class out the door. She headed for the one place she could think of to get help - not the school nurse, but the gym locker room. Kendra breathed a small sight of relief that she didn't see or hear anyone else there. By this time her throat felt even dryer than her skin. Kendra hopped in the first shower stall and closed the curtain.
Kendra had an unusual condition: she was a kind of were-frog. She needed to transform into her amphibian form every 24 hours. If she didn't, she would began to feel sick and dehydrated. If she wasn't careful she could die. But she needed water to transform. Usually this mean a long, relaxing shower every morning. Today she had overslept and in a rush forgot this crucial detail.
She had to be careful. Sweating was safe and a light rainshower wasn't usually a problem, especially if she had recently spent enough time transformed in a moist environment. A heavy downpour would usually start her change unless she had transformed within the last few hours. She could slow the change with enough concentration. Full immersion, like swimming, would always trigger a transformation.
The shower would be her relief. She put her backpack on a high shelf to keep it dry, took off her shoes, and turned on the water with removing her clothes. The water cascading down on her provided instant relief. She closed her eyes and enjoyed the feeling. Her skin began to turn dark green as the water ran down it. Webbing grew between her fingers. Her toes stretched and became webbed as well.