According to EN 82079, a safety precaution (not a warning) is "safety-related information that is collected or grouped in a document or section of a document according to a reasonably organised system in order to explain safety measures, raise safety awareness and provide a basis for safety-related training of users".

A safety precaution serves to protect people and other living beings or the environment from hazards.

[Wikipedia / Further explanation (not available in English): de.wikipedia.org/wiki/Sicherheitshinweis]