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Beach flags are posted to inform beach goers about water conditions

Myrtle Beach has a specific set of beach flags to let beach-goers know about water conditions. The flags will fly from lifeguard stands to alert of any potential dangers.
As indicated, a double red flag means the water is closed to the public; no swimming is allowed. A single red flag indicates hazardous conditions, such as strong waves or currents. Medium hazards are indicated by a yellow flag, while a green flag shows that conditions are generally good. A blue flag indicates dangerous marine life, such as a high number of jellyfish.