the whole world underwater

From That Girl Lucy Moon:

...Miss Ilene Viola Wiggins lived at the top of Wiggins Hill -- the only good sledding hill in Turtle Rock -- and she ran that hill just like she ran the town. Miss Wiggins didn't let kids use toboggans (snap your back) or slide past dark (decapitate someone). Sledders dreamed about that extra slide, when the air turned so blue that the whole world looked like it was underwater, and the only light came from the reflection of the dusk moon on the blue-white snow. Those blue-lit runs were crazy, out of control, rushing, rushing, with roots of trees, clumps of snake-grass, and gopher holes taking on different shapes.

When a bold someone finally tried one of their schemes, they found out that Miss Wiggins was a force unto her own. Their friends would quickly tell them that if they didn't stop sledding, Miss Wiggins might not pay for the new school auditorium, or the machine for the hospital that mapped out a person's insides. Or if they didn't get off the hill, that movie theater with "all-around sound" was doomed. For those undeterred -- and there were always a few every year -- they would find out that Miss Wiggins could see through snowsuits and ski masks, that she knew the names (and more important, the stories) of that person's parents, grandparents, and extended relations. Even five-year-olds who couldn't tie their own shoes got the hint: there was no messing around with Miss Wiggins.

(Photo note:  Finally, a photo of that blue world!  This is a view of a frozen lake in northern Wisconsin.)