Jesus alludes to the truth the earth and all it's works will burn in an oven in Luke 12, in one day
This is what Peter and Paul means by a sudden destruction by fire. God has appointed a day in the future when this will happen, see we are futurists, we are to look forward to these things, not backwards, and also to say in our spirits to come Lord Jesus, even today.
Always be ready for Him.
Do Not Worry
22 Then He said to His disciples, “Therefore I say to you, do not worry about your life, what you will eat; nor about the body, what you will put on. 23 Life is more than food, and the body
is more than clothing. 24 Consider the ravens, for they neither sow nor reap, which have neither storehouse nor barn; and God feeds them. Of how much more value are you than the birds? 25 And which of you by worrying can add one cubit to his stature? 26 If you then are not able to do
the least, why [
d]are you anxious for the rest? 27 Consider the lilies, how they grow: they neither toil nor spin; and yet I say to you, even Solomon in all his glory was not [
e]arrayed like one of these.
28
If then God so clothes the grass, which today is in the field and tomorrow is thrown into the oven, how much more
will He clothe you, O
you of little faith?
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Read what Peter says about the coming DAY of fiery destruction, but in context of the entire chapter, as some people mix this into a mishmash of misunderstanding of the 1000 years comment. The 1000 years mention is about scoffers scoffing saying where is the promise of Christ's coming, not meaning anything else.
2 Peter 3, is written to, for, and about the beloved of God, meaning those who are and will be His people, what will happen in the future. It had not yet happened in Peter's day.
1 Beloved, I now write to you this second epistle (in
both of which I stir up your pure minds by way of reminder), 2 that you may be mindful of the words which were spoken before by the holy prophets, and of the commandment of [
a]us, the apostles of the Lord and Savior, 3 knowing this first: that scoffers will come in the last days, walking according to their own lusts, 4 and saying, “Where is the promise of His coming? For since the fathers fell asleep, all things continue as
they were from the beginning of creation.” 5 For this they willfully forget: that by the word of God the heavens were of old, and the earth standing out of water and in the water, 6 by which the world
that then existed perished, being flooded with water. 7 But the heavens and the earth
which are now preserved by the same word, are reserved for fire until the day of judgment and [
b]perdition of ungodly men.
8 But, beloved, do not forget this one thing, that with the Lord one day
is as a thousand years, and a thousand years as one day. 9 The Lord is not slack concerning
His promise, as some count slackness, but is longsuffering toward [
c]us, not willing that any should perish but that all should come to repentance.
The Day of the Lord
10 But the day of the Lord (Jesus) will come as a thief in the night, in which the heavens will pass away with a great noise, and the elements will melt with fervent heat; both the earth and the works that are in it will be [
d]burned up. 11 Therefore, since all these things will be dissolved, what manner
of persons ought you to be in holy conduct and godliness, 12 looking for and hastening the coming of the day of God, because of which the heavens will be dissolved, being on fire, and the elements will melt with fervent heat? 13 Nevertheless we, according to His promise, look for new heavens and a new earth in which righteousness dwells.
Be Steadfast
14 Therefore, beloved, looking forward to these things, be diligent to be found by Him in peace, without spot and blameless; 15 and consider
that the longsuffering of our Lord
is salvation—
as also our beloved brother Paul, according to the wisdom given to him, has written to you, 16 as also in all his epistles, speaking in them of these things, in which are some things hard to understand, which untaught and unstable
people twist to their own destruction, as
they do also the rest of the Scriptures.
17 You therefore, beloved, since you know
this beforehand, beware lest you also fall from your own steadfastness, being led away with the error of the wicked; 18 but grow in the grace and knowledge of our Lord and Savior Jesus Christ.
To Him
be the glory both now and forever. Amen.