I don't believe that all of the stories in the NT occured, ver batim, as translated,
interpreted and selected throught the course of history. However, i do believe SOMETHING happened that was similar and may actually have a scientific basis. For example, when Moses turned the Nile into "blood", it has been suggested that there is a scientific explanation for what actually occured. I don't remember the details, but it had something to do with a distant earthquake releasing tons of a deep red clay into the Nile. The miracle in all this is that God used what was physically available here on Earth to make these "miracles" happen when He wanted them to happen. As for the flood, that is a common story throughout all of ancient civilization, not just the Middle East. Again, SOMETHING happened, though we may not understand exactly what it was.