No, they indicate that floods happen whenever a
river civilization like those in the Fertile Crescent, the Indus valley or in the Nile establishes along a river flood plain. Its called
flood plain for a reason. If you live in an agricultural world, you expect yearly flooding to fertilize your fields for planting. Mother Nature being the capricious witch that she is, and in the absence of upriver control dams, sometimes the flooding is really bad and you get epic folktales of the angry sky gods washing away everything because this sometimes actually happened.
Does the RCC **require **a belief in the literal noaic flood?