Just a thought. When the bible talks of the world, it is generally referring to the then known world. In that time, most people would have lived near water, not inland. If the waters rose enough to flood the shores and many miles beyond, but not all of the dry land, would records made by those living near the water not show a "global flood"?
This would enable all of the species in one area to fit on the arc and all of the others to live, uneffected by the flood, in their respective habitats.
Being a creationist and a thinking human, I think it is reasonable to say that the mentality of the people in that time would differ greatly from ours. What may seem like the end of the world to them would only be a temperal, local issue for us.
Edited by tdcanam, : spelling