Noah’s Flood was much more destructive than any 40-day rainstorm ever could be. Scripture says that “all the fountains of the great deep” broke open (see Gen. 7:11). In other words, earthquakes, volcanoes, and geysers of molten lava and scalding water were squeezed out of the earth’s crust in a violent, explosive upheaval. These fountains were not stopped until 150 days into the Flood—so the earth was literally churning underneath the waters for about five months! The duration of the Flood was extensive, and Noah and his family were aboard the Ark for over a year.
Relatively recent local floods, volcanoes, and earthquakes—though clearly devastating to life and land—are tiny in comparison to the worldwide catastrophe that destroyed “the world that then existed” (2 Pet. 3:6). All land animals and people not on board the Ark were destroyed in the floodwaters—billions of animals were preserved in the great fossil record we see today.
2 Peter 2:5 … and did not spare the ancient world, but saved Noah, one of eight people, a preacher of righteousness, bringing in the flood on the world of the ungodly