In United States safety standards, precautionary statements are sentences providing information on potential hazards and proper procedures.
Danger statements are a description of situations where an immediate hazard will cause death or serious injury to workers and/or the general public if not avoided.
"[2] Warning statements are a description of a situation where a potentially hazardous condition exists that could result in the death or serious injury of workers and/or the general public if not avoided.
"[2] Notice statements are a description of situations where a non-immediate or potential hazard presents a risk to damage of property and equipment.
For environmental/facility signs, NOTICE is typically the choice of signal word for messages relating to property damage, security, sanitation, and housekeeping rules.