No humans escaped except the Noachians from whom the modern Mayans came. The Tartarians weren't human so (with a few Atlanteans and a number of other races whose names I'm working out) they are still around as such. The original Atlas was a messianic wannabe but didn't have the self-sacrifice thing worked out so he never got to be a dying god like Nimrod. Now he's been repurposed by Ayn Rand so people forget the original. Atlas may have been Kek or one of his brothers.