The beast or Antichrist’s kingdom will be destroyed by Jesus Christ in 2 phases. The first is from heaven as He opens the book that was sealed, then Jesus returns and destroys the rest of Antichrist’s kingdom from earth, mostly in the Battle of Armageddon.
The destruction of the beast’s kingdom by fire is compared to the great flood:
For this they willingly are ignorant of, that by the word of God the heavens were of old, and the earth standing out of the water and in the water: Whereby the world that then was, being overflowed with water, perished: But the heavens and the earth, which are now, by the same word are kept in store, reserved unto fire against the day of judgment and perdition of ungodly men. (2 Peter 3:5-7)
The flood lasted about 1 year:
In the six hundredth year of Noah’s life, in the second month, the seventeenth day of the month, the same day were all the fountains of the great deep broken up, and the windows of heaven were opened. (Genesis 7:11)
And it came to pass in the six hundredth and first year, in the first [month], the first [day] of the month, the waters were dried up from off the earth: and Noah removed the covering of the ark, and looked, and, behold, the face of the ground was dry. And in the second month, on the seven and twentieth day of the month, was the earth dried. (Genesis 8:13-14)
The destruction of the beast’s kingdom takes at least 5 months and maybe up to 1 year:
And they had tails like unto scorpions, and there were stings in their tails: and their power [was] to hurt men five months. (Revelation 9:10)
For [it is] the day of the LORD’S vengeance, [and] the year of recompences for the controversy of Zion. (Isaiah 34:8)
People are scorched with fire:
The earth also is defiled under the inhabitants thereof; because they have transgressed the laws, changed the ordinance, broken the everlasting covenant. Therefore hath the curse devoured the earth, and they that dwell therein are desolate: therefore the inhabitants of the earth are burned, and few men left. (Isaiah 24:5-6)
And the fourth angel poured out his vial upon the sun; and power was given unto him to scorch men with fire. (Revelation 16:8)
God’s army destroys with fire.
Blow ye the trumpet in Zion, and sound an alarm in my holy mountain: let all the inhabitants of the land tremble: for the day of the LORD cometh, for [it is] nigh at hand; A day of darkness and of gloominess, a day of clouds and of thick darkness, as the morning spread upon the mountains: a great people and a strong; there hath not been ever the like, neither shall be any more after it, [even] to the years of many generations. A fire devoureth before them; and behind them a flame burneth: the land [is] as the garden of Eden before them, and behind them a desolate wilderness; yea, and nothing shall escape them. (Joel 2:1-3)
And the LORD shall utter his voice before his army: for his camp [is] very great: for [he is] strong that executeth his word: for the day of the LORD [is] great and very terrible; and who can abide it? (Joel 2:11)
The earth’s landscape will also be changed:
Behold, the LORD maketh the earth empty, and maketh it waste, and turneth it upside down, and scattereth abroad the inhabitants thereof. (Isaiah 24:1)
The earth is utterly broken down, the earth is clean dissolved, the earth is moved exceedingly. (Isaiah 24:19)
And the heaven departed as a scroll when it is rolled together; and every mountain and island were moved out of their places. (Revelation 6:14)
But just as God restored the earth after the flood, so He will do after the fire.
Note that not only is the fourth kingdom destroyed, but all four kingdoms are destroyed by Jesus Christ and His eternal kingdom:
And in the days of these kings shall the God of heaven set up a kingdom, which shall never be destroyed: and the kingdom shall not be left to other people, [but] it shall break in pieces and consume all these kingdoms, and it shall stand for ever. (Daniel 2:44)