Three flags warn of surf and rip current conditions. Red means a high hazard, yellow means a moderate threat and green means low danger. There's also purple for dangerous sea life, such as jellyfish, and double red when a beach is closed for any reason.

High Surf Advisory is in effect through Thursday, with the risk of dangerous rip currents stretching across local beaches. Here's what to know.

The girl’s sister, Sameeha Sultana, 13, was found unresponsive about an hour later at 7th Avenue, a block north. Rescue crews and the U.S. Coast Guard pulled her out of the water, and CPR was performed. She was taken to Jersey Shore University Medical Center, where she was pronounced dead.

Rip currents off the coast of New Hampshire last week resulted in dozens of rescues on Hampton Beach. Lifeguards at the popular summer destination made 144 rescues over six days, the New Hampshire State Beach Patrol said. There were 51 rescues on Aug. 12 alone.

Jacksonville's NWS issues high rip current risk warning for Northeast Florida beaches through Saturday evening.

Hurricane Erin is moving closer to the U.S. coast at the start of the workweek. Strong wind and big waves will cause problems for our North Carolina beaches as summer vacations continue.