Warning Signs are displayed to advise and forewarn of potential dangers. The signs' supplementary text should always include one of three words:-
Danger: High level risk that could result in death or serious injury. This keyword should be limited to the most extreme hazard cases.
Warning: Medium level risk that could result in minor or moderate injury.
Caution: Low level risk whihc could lead to minor injury.
These signs should include a yellow triangle with black border containing a warning symbol conforming to ISO 7010.