[header] How to help a dog overcome a fear of fireworks or thunder [title] Minimize the stimulation. [step] Insulate your dog from the bright lights and loud noises of storms and fireworks. Bring the dog indoors, and close all windows and doors. 
Draw the curtains so the dog can't see the flashes. If appropriate (not during an electrical storm) put the tv on with the volume low, to act as a distraction.