Following is a transcript of the video. Narrator: Fireworks have been around for millennia. They flood the sky with brilliant bursts of scarlet, emerald, and ivory. But never blue. Pyrotechnicians ...

Keep shades drawn to minimize noise and light from fireworks. Keep your pets at home if you are able, and create the most comfortable environment possible with their favorite treats, toys and bedding.

Because the static electricity in synthetic clothing can create sparks capable of detonating fireworks, those who make shells must stick to wearing cotton—all the way down to their underwear.