The coming of the son of man will be like that. Just as it was back then, people today are eating and drinking and marrying and giving in marriage. People today won't understand what is happening until the son of man comes. And just as it was back then, today we have preachers of righteousness trying to warn people of the impending judgment. And just as it was back then, God will provide a way for the righteous to escape what is coming.
In my view, the rapture of the church is analogous to Noah's ark.
Jesus has provided the way. He is the ark today. He will come and receive his own while the rest perish along with the heaven and the earth. The ungodly will suffer the same fate as those in Noah's day. This is repeated many times in the NT.
2Thess 1
5
This is a positive proof of the righteous judgment of God [a sign of His fair verdict], so that you will be considered worthy of His kingdom, for which indeed you are suffering. 6 For after all it is
only just for God to repay with distress those who distress you, 7 and to
give relief to you who are so distressed and to us as well when the Lord Jesus is revealed from heaven with His mighty angels in a flame of fire, 8
dealing out [full and complete] vengeance to those who do not [seek to] know God and to those who ignore and refuse to obey the gospel of our Lord Jesus [by choosing not to respond to Him]. 9 These people will pay the penalty and endure the punishment of everlasting destruction, banished from the presence of the Lord and from the glory of His power, 10 when He comes to be glorified in His saints on that day [that is, glorified through the changed lives of those who have accepted Him as Savior and have been set apart for His purpose], and to be marveled at among all who have believed, because our testimony to you was believed
and trusted [and confirmed in your lives].
Lk 21
33 Heaven and earth will pass away, but My words will not pass away.
34 “But be on guard, so that your hearts are not weighed down
and depressed with the giddiness of debauchery and the nausea of self-indulgence and the worldly worries of life, and then that day [when the Messiah returns] will not come on you suddenly like a trap;
35 for it will come upon all those who live on the face of all the earth. 36 But keep alert at all times [be attentive and ready], praying that you may have the strength and ability [to be found worthy and] to escape all these things that are going to take place, and to stand in the presence of the Son of Man [at His coming].”
2pet 3
7 But by His word the present heavens and earth are being reserved for fire, being kept for the day of judgment and destruction of the ungodly people.
9 The Lord does not delay [as though He were unable to act]
and is not slow about His promise, as some count slowness, but is [extraordinarily] patient toward you, not wishing for any to perish but for all to come to repentance.
10 But the day of the Lord will come like a thief, and then the heavens will vanish with a [mighty and thunderous] roar, and the [material] elements will be destroyed with intense heat, and the earth and the works that are on it will be burned up.
11 Since all these things are to be destroyed in this way, what kind of people ought you to be [in the meantime] in holy behavior [that is, in a pattern of daily life that sets you apart as a believer] and in godliness [displaying profound reverence toward our awesome God], 12 [while you earnestly] look for and await the coming of the day of God. For on this day the heavens will be destroyed by burning, and the [material] elements will melt with intense heat! 13 But in accordance with His promise we expectantly await new heavens and a new earth, in which righteousness dwells.
14
So, beloved, since you are looking forward to these things, be diligent and make every effort to be found by Him [at His return] spotless and blameless, in peace [that is, inwardly calm with a sense of spiritual well-being and confidence, having lived a life of obedience to Him]. 15 And consider the patience of our Lord [His delay in judging and avenging wrongs] as salvation [that is, allowing time for more to be saved]; just as our beloved brother Paul also wrote to you according to the wisdom given to him [by God], 16 speaking about these things as he does in all of his letters.