Luke 17:24-30
"You know how the whole sky lights up from a single flash of lightning? That's how it will be on the Day of the Son of Man. 25 But first it's necessary that he suffer many things and be turned down by the people of today.
26 "The time of the Son of Man will be just like the time of Noah — 27 everyone carrying on as usual, having a good time right up to the day Noah boarded the ship. They suspected nothing until the flood hit and swept everything away.
28 "It was the same in the time of Lot — the people carrying on, having a good time, business as usual 29 right up to the day Lot walked out of Sodom and a firestorm swept down and burned everything to a crisp. 30 That's how it will be — sudden, total — when the Son of Man is revealed.

Noah and Lot are in the Old Testament.