Hi Fisherman,
<<No. I already explained that it would seem like normal times to people who took no note. If actually normal times nothing to notice.>>
The point is that the people in Noah's day were carrying on as normal totally unaware of the coming deluge or they would have prepared for it. The same will be the case when at the coming (Parousia) of Christ. It will be a complete surprise (the timing unknown to believers as well.)
"In a time that you think not, the Son of Man will come.
35 For it will come on all those who live on the face of the whole earth. 36 Be always on the watch, and pray that you may be able to escape all that is about to happen, and that you may be able to stand before the Son of Man.”