What does it mean that fireworks are strictly prohibited in important oil depots?

They are in danger of explosion when they meet an open flame, so fireworks are strictly prohibited.

The air in flour mills and gas stations is often mixed with combustible dust or combustible gas, which is in danger of explosion in case of open fire. Fireworks are strictly prohibited.

The substance is flammable, fully contacted with oxygen, and the temperature reaches the ignition point of flammable substances; First, there should be enough air when burning; Second, the contact area between fuel and air should be large enough.