"As it was in the days of Noah, so will it be at the coming of the Son of Man." - Matt 24:27

This statement is one of several from Jesus Himself indicating what we should expect to see before "the coming of the Son of Man".

The account of Noah is very short - basically confined to 4 chapters at the beginning of the Book of Genesis. And in these 4 chapters there really are only a couple of statements that describe conditions during "the days of Noah".

"Then the LORD saw that the wickedness of man was great upon the earth, and that every inclination of the thoughts of his heart was altogether evil all the time." - Gen 6:5

and

"the earth was corrupt in the sight of God, and full of violence." - Gen 6:11

These statements suggest that this "wickedness", "corruption", and "violence" were ubiquitous - meaning everywhere.

And that in spite of this degeneration of the human condition, people were carrying out the normal business of life.
"people were eating and drinking, marrying and giving in marriage" - Matt 24:37

Paul, in his letter to Timothy, provides another concise yet comprehensive list of characteristics that we should expect to see in the days leading up to the "coming of the Son of Man".

"For men will be lovers of themselves, lovers of money, boastful, arrogant, abusive, disobedient to their parents, ungrateful, unholy, unloving, unforgiving, slanderous, without self-control, brutal, without love of good, traitorous, reckless, conceited, lovers of pleasure rather than lovers of God, having a form of godliness but denying its power."

- 2 Tim 3:1-5

"Your kingdom come..."