Caution Sign Board CIP-WF-WIP C-208 Caution board signs alert the public to the dangers of slippery, wet floors or other hazards that pose a safety risk, the bright yellow color easily attract attention which is also easily noticeable. The caution sign alerts emergency responders and visitors of potential hazards and precautions for entry. Warning signs alert personnel and visitors to health and safety hazards beyond those identified in the caution sign. Specific warning signs may be required based on the type of hazard present