because they can!
When we were kids in the DR, that was one thing that got my brothers going. Unfortunately, my brother nearly shot off his own hand. They have fireworks in the Florida keys, and in Hawaii too. My guess, it's only we from the north, where it's cold, and nobody wants to go outside and freeze their buns off, where fireworks are not customary on Christmas and New Year's.
Fireworks in the tropics! We have a dusting of snow compared to your hot. Wish I were there.
