They ate, they drank, they married, they were given in marriage, until the day came that Noah went into the ark, and the cataclysmic flood came and destroyed all of them.
Luke 17:27
In other words, their lives proceeded relatively normally right up to the minute that catastrophe struck. This world will march along thinking all is proceeding according to plan, and Christ will catch it by surprise.
Heavenly Father, thank You for Your work in history! You are not mocked. You have everything planned out from the beginning to the end. It is all there in Your mind. You are the Great Architect and Builder of all that we see and know. Thank You! In the Name of the Lord Jesus Christ I pray and praise You, Amen.