Umi squatted down over the tiny civilization, lowering her light blue panties down to her ankles. She was really going to do this...
It started with a single golden yellow droplet falling onto a city street. It was enough to capture a few cars and people within its smelly viscosity. But that was only a single droplet of Umi's pee, there was more to come. Much more.
After cracking the faintest of smirks, Umi released the rest of her urinal buildup. The hot, boiling, steaming stream of golden yellow piss obliterated city streets, washing away any semblance of civilizations who could have lived there. The piss stream quickly transitioned from a golden yellow to a perfectly clear color, showing how seriously Umi took her hydration levels.
But still, the boiling hot liquid continued to decimate street after street, striking down schools, flooding hospitals, washing away countless people, police forces, vehicles, anything in its path of destruction and mayhem. Umi giggled as the pee continued to flow. She now saw this as a cleansing; a cleansing of both her body, and the tiny infestation she was made aware of.
Soon enough, the microscopic civilization had nearly fully flooded from her pee alone. Few tiny specks that couldn't be identified, some trees and other vegetation, and various other debris floated to the top. But most everything else was washed away in The Great Flood.
With a satisfied moan, Umi reached for a nearby tissue and wiped herself up. She then stood up from her squatting position and raise her light blue panties back up.
"That will teach you all to settle down and create such a society under my family's nose, without my permission. This is your just fate, please accept it."
And so the very few remaining specks were forced to do so. Everything they once knew had been washed away in seconds from a single high school girl.