Because Noah had faith, he was warned about something that had not yet happened. He obeyed and built a boat that saved him and his family. In this way the people of the world were judged, and Noah was given the blessings that come to everyone who pleases God.
God cannot tell lies! And so his promises and vows are two things that can never be changed. We have run to God for safety. Now his promises should greatly encourage us to take hold of the hope that is right in front of us.
But God has commanded the present heavens and earth to remain until the day of judgment. Then they will be set on fire, and ungodly people will be destroyed.