When her judgment finally comes, it will be swift and decisive (Isa. Isa. 47:9, Isa. 47:11; Rev. Rev. 18:9+, Rev. 18:10+, Rev. 18:17+, Rev. 18:19+). See Babylons Predicted Destruction.
The suddenness and completeness of Babylons judgment and disappearance from the face of the earth is the one prominent feature of this prophecy: and it effectually proves that it has not yet taken place. For Jehovahs prophecies are far too accurate and particular for this suddenness and completeness to be fulfilled by the gradual decay of old Babylon, the site and ruins and remains of which are still to be seen in the land of Shinar.1
She shall be burned with fire (ἐν πυρὶ κατακαυθήσεταὶ [en pyri katakauthēsetai] ) corresponds closely to the κατακαύσουσιν ἐν πυρί [katakausousin en pyri] of Rev. Rev. 17:16+ and must be the same destruction.2she will be utterly burned with fire
Like Sodom and Gomorrah, Babylon will be destroyed by fire (Isa. Isa. 13:19-20; Isa. 47:14; Jer. Jer. 50:40; Jer. 51:58; Rev. Rev. 18:9+). Her burning is complete and final: Her smoke rises up forever and ever! (Rev. Rev. 19:3+). The Beast and the ten kings of the end will assist in her destruction (Rev. Rev. 17:16+). See The Destruction of Babylon.
for strong is the Lord God who judges her
Thus says the LORD of hosts: The children of Israel were oppressed, along with the children of Judah; all who took them captive have held them fast; they have refused to let them go. Their Redeemer is strong; the LORD of hosts is His name. He will thoroughly plead their case, that He may give rest to the land, and disquiet the inhabitants of Babylon. (Jer. Jer. 50:33-34) [emphasis added]