A fire would destroy Nineveh, while the sword would chase people away. The city would be decimated, as if a swarm of locusts had come through there. They would have to multiply themselves like grasshoppers or locusts, as their merchants had done in the past. These commercial envoys of Nineveh were as numerous as the stars. Just as the locust sheds its skin, so that it can fly away, the guards at Nineveh would be like grasshoppers, hip hopping away. Their scribes were like swarms of locusts sitting on a fence on a cold day. However, when the sun came up the next day, these scribes would fly off, where no one would know where they went. As this was going to happen to Nineveh, no one would know where in the world they went.
Thus, there is a fusion of the swarm of locusts with the day of Yahweh. The earth would quake. The heavens would tremble. The sun and the moon would become dark. The stars would not shine. Yahweh would utter his strong voice before this vast numberless army. They all would obey his command. The day of Yahweh would be a terrible, but great day. Who would be able to endure this?
Joel continued his description of the swarm of locusts as they attacked the city and the people in it. The people there were in aguish, as their faces turned pale. These grasshoppers charged like warriors. They scaled the walls like soldiers. These locusts stayed in formation, not wandering around. They did not try to push each other around. They were able to go straight through any barriers or weapons. They leapt into the city on its walls and in its houses. These locusts came through the windows, like a thief in the night. This plague of grasshoppers was really strong and powerful in their destruction.
This swarm of locusts had the appearance of charging war horses. They were like rumbling chariots leaping to the tops of the mountains. They were like a crackling flame in a fire devouring the grass stubble in front of it. They were like a powerful army ready for battle. These were the dangerous grasshoppers.