This is the city collapsing, and the sound of the enemy approaching. The whole city will come down and lead to howling and cries.
So it will be with the last judgment. Here we are, we have the word of God, we preach the word of God, the Bible is still the bestselling book in the world. People know about it; but many, many people who do know the message will still be amazed and shocked when the final day of judgment comes. Why? Because they shut their ears to it, and refused to believe it, even though their world was disintegrating around them; they tried to put it as far from their thinking as they could, and so the warning was wasted on them. The judgment of Jerusalem by the Babylonians, a literal historical event, is a kind of visual aid, a living enacted prophecy of further judgments when Christ would come at the end of the world.