I love you, California, you're the greatest state of all. I love you in the winter, summer, spring and in the fall. I love your fertile valleys; your dear mountains I adore. I love your grand old ocean and I love her rugged shore.
Fireworks are reactions that happen in the sky. The comparison is fireworks and the person the song is about are both special, unique, and beautiful, but if mis treated both can hurt you. A firework can explode, and so can a person's emotions.