- It provides a source of ignition that could ignite a vapor release from another location.
- The person doing the hot work may cut through the wrong line or burn a hole in the wrong piece of equipment. This could lead to the release of hazardous chemicals, or cause a fire or explosion.
- The person doing the work could be burned by the equipment that they are using.
- In confined spaces, the hot work itself can create a harmful atmosphere, leading to the possibility of a worker being overcome by fumes.