Storing explosives properly is always a good idea even if it just is fireworks. In Germany they usually air warning spots on TV between Chirstmas and new year´s eve to encourage people to be careful with the fireworks (e. g. https://www.youtube.com/watch?v=9Z8DFh9Jp-0&t=160, they blow up a dummy hand so viewer´s discretion might be required).
Fireworks bear an extra risk as they usually are stored fused.