When monitoring water conditions, what specific element may limit a lifeguard's ability to perform rescues?

Strong surf waves can significantly impact a lifeguard's ability to perform rescues. When the surf is strong, the waves can become powerful and unpredictable, creating hazardous conditions not only for swimmers but also for lifeguards attempting to reach them. High waves can make it difficult to maintain a clear line of sight to identify individuals in distress, and the force of the waves can hinder a lifeguard's ability to swim efficiently or safely approach someone in need of assistance. The turbulent water can also increase the risk of being pulled under or having difficulty returning to shore after performing a rescue. Therefore, understanding the dynamics of water conditions, particularly the impact of strong surf, is crucial for ensuring the safety of both the lifeguard and the individuals they are tasked to assist.