When is it essential for lifeguards to conduct a safety check of their area?

Conducting a safety check at the beginning of each shift and periodically throughout is essential for lifeguards to ensure the area is safe for patrons. This practice allows lifeguards to identify and address potential hazards before they result in accidents. Regular safety checks help maintain awareness of the environment, including looking for issues such as damaged equipment, cleanliness, and any weather-related changes that could impact safety.

By performing checks at the start of shifts, lifeguards establish a baseline for safety, while ongoing assessments throughout their duty help to adapt to any new conditions or concerns that may arise. This proactive approach is crucial for preventing incidents and promoting a safe swimming environment for everyone. The other options do not provide a consistent or comprehensive approach to safety, as they either occur too infrequently or only in reaction to reported concerns.