18 The waters swelled and increased greatly on the earth; and the ark floated on the face of the waters. 19 The waters swelled so mightily on the earth that all the high mountains under the whole heaven were covered; 20 the waters swelled above the mountains, covering them fifteen cubits deep.

21 And all flesh died that moved on the earth, birds, domestic animals, wild animals, all swarming creatures that swarm on the earth, and all human beings; 22 everything on dry land in whose nostrils was the breath of life died. 23 He blotted out every living thing that was on the face of the ground, human beings and animals and creeping things and birds of the air; they were blotted out from the earth. Only Noah was left, and those that were with him in the ark. 24 And the waters swelled on the earth for one hundred fifty days.

Matthew Henry's Commentary on Genesis 7:18-24

Commentary on Genesis 7:17-20

(Read Genesis 7:17-20)

The flood was increasing forty days. The waters rose so high, that the tops of the highest mountains were overflowed more than twenty feet. There is no place on earth so high as to set men out of the reach of God's judgments. God's hand will find out all his enemies, Psalm 21:8. When the flood thus increased, Noah's ark was lifted up, and the waters which broke down every thing else, bore up the ark. That which to unbelievers betokens death unto death, to the faithful betokens life unto life.

Commentary on Genesis 7:21-24

(Read Genesis 7:21-24)

All the men, women, and children, that were in the world, excepting those in the ark, died. We may easily imagine what terror seized them. Our Saviour tells us, that till the very day that the flood came, they were eating and drinking, 2 Peter 2:5. How tremendous will be the day of judgment and perdition of ungodly men! Happy they who are part of Christ's family, and safe with him as such; they may look forward without dismay, and rejoice that they shall triumph, when fire shall burn up the earth, and all that therein is. We are apt to suppose some favourable distinctions in our own case or character; but if we neglect, refuse, or abuse the salvation of Christ, we shall, notwithstanding such fancied advantages, be destroyed in the common ruin of an unbelieving world.