If you see some kind of the explosion in a dream, then such dream indicates the losses and unfavorable situations within your businesses. The dream could also show that the emotions you were hiding away is coming to the point where you are no longer able to hold it. If you were injured in the explosion, then it shows the huge disappointments you will suffer, because of the other peoples actions. If you were blown away by the explosion, then such dream indicates the deception from your friends or relatives. If you only heard the sound of the explosion, then it shows the minor problems that will stay only for short period of time.
Read more about dreaming of Explosion in other dream meanings interpretations.