No Morning After (1954) short story

In his darkly humorous look at doomsday, "No Morning After," Arthur C. Clarke has a telepathic race of extraterrestrials contact a man to warn him of the Earth's imminent destruction from its sun going nova. In order to save the Earth's population, the aliens will create wormholes all over the Earth and through which people can enter to instantly find themselves on a new world. All the contactee has to do is inform others of what to do. Due to his personal problems, however, things don't go as planned for the aliens, except for the part about the sun exploding just as they had calculated it.