Seeing sparks in your dream signifies the likelihood of hearing insulting or harsh words. If you dream that sparks are coming towards you, it indicates that someone may speak harshly against you. This serves as a warning, urging you to be prepared and ready to handle the situation. Be cautious in your relationships with those around you and stay aware of the impact of their words.
From Imam Muhammad Ibn Seerin's Dictionary of Dreams According to Islamic Inner Traditions â entry "Sparks" (page 402).
In a dream, sparks represent ugly words. If one sees sparks hitting him in a dream, it means that he will hear harsh words pronounced against him by someone in authority. If one's clothing ignites and burns from sparks in the dream, it means aggravation of his condition. If smoke engulfs the sparks in one's dream, then they represent an awesome adversity. Whenever smoke appears in one's dream, it represents an appalling and a horrifying calamity. If the sparks cause secondary burns in the dream, then they represent a weak enemy who slanders him and one may bear the consequences of such slander
with patience, and its evil and fire will eventually diminish. If one sees a major eruption of sparks in his dream, they represent a major calamity. Ifa spark falls in the midst of a gathering in the dream, it means a fight and harm. Sparks in a dream also represent one's children. Ifsparks burn one's face in a dream, they mean continuous suffering and disturbances. Sparks in a dream also mean evil deeds, sins and crimes that call for punishment in hell-fire. (Also see Flint Stone)
Note: Islamic dream interpretation depends on the dreamer's circumstances and state. This is a general guide drawn directly from the source book.