As for 'Floods', what about the ancient Egyptians, who - along with the ancient Chinese - with their continuous recorded history, never experienced a cataclysmic civilisation-annihilating event? Indeed, if 'twere not for floods, the ancient Egyptians would've been annihilated way before that in the Bible.
The annual flooding of the Nile was essentially the basis of the Egyptian civilisation, as the fertile silt deposited on the rich agricultural land on the Nile's banks ensured the continuation of food production.
No flood, no food. No ancient Egypt. They existed after that described in the Bible; certainly before. And during. You do the maths.
@Comrade Potatovich
Sorry 'bout that. On the other hand, like I say, should this Raptard ever hear about the genre-defining series by Gainax - and aforementioned Christian imagery therein (has this idiot never seen the slogan on the 'NERV' logo, for Shinji's sake?!) - then methinks this Retardian will drop said screename like a plugsuit with a skidmark in it. XP X3
...and 'Rei-ge'? I like the cut of your pun jib, sir!
@Swede
Y'gotta love how Kosuke Fujishima used the idea of Yggdrasil as a huge cosmic hypercomputer that controls reality, in his manga/anime "Ah! My Goddess"; also how he incorporated the three Norns in this, one of the finest 'harem' scenarios since "Tenchi Muyo": Belldandy, the quintessential 'Yamato Nadeshiko'; Urd the smokin' hot seductress (via her Demon side, natch) and (al)chemist; Skuld the halfpint but genius engineer.
So many Scandinavians I've seen on the internet have felt pride about how Norse mythology/legends have been used in this way - in manga/anime - to showcase the best of their ancient culture, which still has great power today (as does Arthurian legends - and how such is used in 'pop culture' - with we Brits: Sabre in the visual novel/anime "Fate/Stay Night", for example).
...but, post-Mel Gibson's "Apocalypto" - the nearest thing has been the Franco-Japanese production "The Mysterious Cities of Gold" - I wish there could be an anime of Mayan mythology & legends today, using their 'World Tree' stories as a basis; and their leaders: '18 Rabbit', and the founder, Kinich Yax Kuk'mo.