The Sky Is Falling

Dave stared around the office. He went to the window and stared upwards at the crazy patchwork of the sky. For all he knew, in such a sky there might be cracks. In fact, as he looked, he could make out a rift, and beyond that a ... hole ... a small patch where there was no color, and yet the sky there was not black. There were no stars there, though points of light were clustered around the edges, apparently retreating.
Lester del Rey was an American science fiction author and editor at Del Rey Books. He was awarded the E. E. Smith Memorial Award for Imaginative Fiction, Balrog Award and the 11th SFWA Grand Master.