What is a potential risk of working on an exhaust system that has not cooled down?

Working on an exhaust system that has not cooled down presents a significant risk of sustaining third-degree burns. Exhaust systems operate at extremely high temperatures when the vehicle has been running, and touching any part of the system that is still hot can result in severe burns to the skin. Third-degree burns are the most serious type of burn, penetrating through the skin and damaging deeper tissues.

Prioritizing safety around hot components is crucial, and ensuring that the system has cooled sufficiently before beginning work is essential for preventing serious injuries. While it is wise to be aware of other risks, such as electrical issues or potential exhaust leaks, the immediate and critical danger from direct contact with hot exhaust parts is the risk of burns.