Degrees of Care
Some jurisdictions have "degrees of care." This says that certain people who deal with things known to be dangerous, like people working with explosives, or those who have accepted a special responsibility towards other, such as common carriers, are held to a higher degree of care. This says that they are required to exercise "the highest degree of care" or "the utmost caution characteristic of very careful prudent persons."
Other jurisdictions reject degrees of care though. These would just say that the standard of care is the same, but since this standard is based off the circumstances, such people would merely have to use more care because of the circumstances.