What must warning signs indicate in relation to hazardous areas?

Warning signs in hazardous areas serve a critical role in safety by communicating the potential dangers present. The requirement for such signs to say "Danger/Warning" is essential because it clearly informs individuals about the nature of the hazard and the need for caution. This straightforward language is universally recognized, allowing anyone who approaches the area to understand the risks involved, thus promoting safety and vigilance.

While "No Entry" could indicate that access is prohibited, it does not provide information about the specific dangers present. Similarly, signs that indicate risk levels or are designed to be visually alarming are important, but they may not be as immediately effective in communicating the urgency or necessity for caution like "Danger/Warning" does. The clarity and directness of having "Danger/Warning" on the signs align with safety regulations and best practices in hazardous environments, ensuring that all personnel are adequately informed of risks.