'Wipe' in the Bible

So the Lord said, "I will wipe humankind, whom I have created, from the face of the earth -- everything from humankind to animals, including creatures that move on the ground and birds of the air, for I regret that I have made them."

For in seven days I will cause it to rain on the earth for forty days and forty nights, and I will wipe from the face of the ground every living thing that I have made."

What if there are fifty godly people in the city? Will you really wipe it out and not spare the place for the sake of the fifty godly people who are in it?