How can you safely extinguish a campfire to prevent any potential hazards or risks?

To safely extinguish a campfire and prevent hazards, follow these steps:

1. Allow the firewood to burn completely to ash.
2. Pour water over the embers, stirring with a shovel to ensure all parts are wet.
3. Continue adding water until hissing sounds stop.
4. Use a shovel to mix the ashes and embers to cool them down.
5. Feel the ashes with your hand to ensure they are cool to the touch before leaving the site.