He goes on to write the following: " They had to pay close attention to their work as a moment too long on the wheel could cause the steel to overheat and be ruined."
Volcanic ash can clog up and damage jet engines while the tiny particles of glass in the ash can also melt and block the ventilation holes which can cause the engines to overheat and stop working.
After releasing chlorine in the air that sends all of the workers on the train back to the city, Jazz makes sure the smelter overheats, which will ensure that the factory is destroyed.