Was Noah's flood global or local?

The debate between a global and a local flood is one of the more interesting ones in biblical interpretation, and the text itself is where we need to start.

The language of Genesis 6-9 is comprehensive. "All the high mountains under the whole heaven were covered." "Every living thing that moved on the earth perished." "Only Noah was left, and those who were with him in the ark." (Genesis 7:19-23). This is not the language of a regional event. The repeated use of "all" and "every" in describing what was destroyed, and the necessity of building an ark to preserve animal kinds, both strongly suggest a universal flood.

The New Testament treats the flood as a universal, world-altering event. 2 Peter 3:5-6 compares the original creation to "the world that then existed was deluged with water and perished" — setting it alongside the future destruction of the entire world. Jesus uses Noah as an illustration of universal judgment (Matthew 24:37-39) — not a regional inconvenience.

Young earth creationists argue that the flood explains much of the geological record — the sedimentary layers, fossil distribution, and canyon formations that secular geology attributes to millions of years. This is a serious scientific position held by credentialed researchers, though it is a minority view in mainstream science.

Local flood advocates — including some evangelical scholars — argue that "all the earth" in ancient Hebrew idiom could refer to the known world of Noah's time, not the entire globe, and that a catastrophic regional flood could accomplish the theological purposes of the narrative.

I find the global flood reading more consistent with the text and with the New Testament's use of it. But the most important point is this: the flood was a real, historical, catastrophic act of divine judgment — and the rainbow that followed it is a real, historical covenant promise that God will never again destroy the earth by flood (Genesis 9:13-15). That promise still stands.