Jesus teaches that the Flood actually happened. He warns his listeners about the coming judgment.
"But as the days of Noah were, so also will the coming of the Son of Man be. For as in the days before the flood, they were eating and drinking, marrying and giving in marriage, until the day that Noah entered the ark, and did not know until the flood came and took them all away, so also will the coming of the Son of Man be." Matthew 24:37-39
Peter teaches that God's judgment and salvation are good.
"For if God ... 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 ... then the Lord knows how to deliver the godly out of temptations and to reserve the unjust under punishment for the day of judgment..." 2 Peter 2:4-9
The writer of Hebrews describes the faith of Noah.
"By faith Noah, being divinely warned of things not yet seen, moved with godly fear, prepared an ark for the saving of his household, by which he condemned the world and became heir of the righteousness which is according to faith." Hebrews 11:7