This doesn't read like a nuke to me. But a cloud from God just as Jesus ascended in a cloud.
Then they heard a loud voice from heaven saying to them, “Come up here.” And they went up to heaven in a cloud, while their enemies looked on.
Nothing noted about survivors from a Nuke or intense fires but from a earthquake. I don't see survivors from a nuke in a city the size of Jerusalem.
13 At that very hour there was a severe earthquake and a tenth of the city collapsed. Seven thousand people were killed in the earthquake, and the survivors were terrified and gave glory to the God of heaven.
What I do reason is that earthquake split the mount of olives in two caused by the Lord. Again the same city and the same time of the end.
Zech 14
On that day his feet will stand on the Mount of Olives, east of Jerusalem, and the Mount of Olives will be split in two from east to west, forming a great valley, with half of the mountain moving north and half moving south. 5 You will flee by my mountain valley, for it will extend to Azel. You will flee as you fled from the earthquake in the days of Uzziah king of Judah. Then the Lord my God will come, and all the holy ones with him.
John gave a better description of the cloud ascending into heaven in revelation 6.Its seen at the time of the great earthquake which strikes Jerusalem and just before the 144000 are sealed.Here is johns witness of that cloud.
12 And I beheld when he had opened the sixth seal, and, lo,
there was a great earthquake; and the sun became black as sackcloth of hair, and the moon became as blood;
13 And the stars of heaven fell unto the earth, even as a fig tree casteth her untimely figs, when she is shaken of a mighty wind.
14 And the heaven departed as a scroll when it is rolled together; and every mountain and island were moved out of their places.
15 And the kings of the earth, and the great men, and the rich men, and the chief captains, and the mighty men, and every bondman, and every free man, hid themselves in the dens and in the rocks of the mountains;
16 And said to the mountains and rocks, Fall on us, and hide us from the face of him that sitteth on the throne, and from the wrath of the Lamb:
17 For the great day of his wrath is come; and who shall be able to stand?
Note
Those in Judea who fled for the mountains when the abomination of desolation was placed are seen here in the mountains hiding in caves.
Jesus has stated that when the abomination of desolation is placed in Jerusalem ,that it would be a time of great tribulation,the likes of which have never been seen or shall ever be seen again.
Keep that In mind.The abomination of desolation is far worse than anything mankind has ever seen.