July 4th is the day of the year that the most dogs get lost from their owners. They bolt when their hear fireworks.
This owner is lucky. The dog was leashed, but had no i.d. tag. Always take precautions. Leave your pet home, make sure doors are locked, and make sure that visitors don't let the dog out by mistake when they enter the house.
I wish I had posted these links before the holiday, but here they are now, at least.
These all cover others things you can do to keep your pet safe during fireworks going off in your neighborhood, as well as signs to recognize in your pet.