'Floodwaters' in the Bible

They are like a person building a house, who dug a deep hole to lay the foundation on rock. When a flood came, the floodwaters pushed against that house but couldn't shake it, because it had been founded on the rock.

But the person who hears what I say but doesn't act on it is like someone who built a house on the ground without any foundation. When the floodwaters pushed against it, that house quickly collapsed, and the resulting destruction of that house was extensive."