What should be done to ensure safety when approaching during a wheel fire?

Approaching from the back during a wheel fire is the safest option because it minimizes exposure to potential hazards associated with the fire. Typically, fires can generate extreme heat and smoke, which can present dangers from the front where flames may be most visible and active. Approaching from the back allows a person to observe the situation while keeping a safe distance from the source of the heat and flames. Additionally, it provides a clearer exit path in case the situation escalates, ensuring a quicker retreat if necessary.

The other options, while appearing safe in different contexts, pose greater risks. Approaching from the front could directly expose an individual to the fire and any possible explosions or flare-ups. Approaching from the side might still put someone in proximity to the flames and inhalation of hazardous smoke. Choosing not to approach at all might be the safest route in certain scenarios, such as when the fire is large or uncontrollable, but in the context of assessing and responding to the situation, approaching from the back is the best practice.