J.G. Ballard, The Drowned World (1962)Read about the other books on the list.
Though the post-apocalypse subgenre is nearly as old as SF itself, it wasn't until Ballard came along that people really started to enjoy it. Literally. The Drowned World is a global warming story, where "solar radiation" has melted the poles — and our naturalist hero loves nothing more than to watch the city of London slowly melting into a neo-Triassic muck. This novel paved the way for a whole subgenre of darkly satirical apocalypse tales that suggest the end of the world might be what we secretly want (and deserve).