Image sent to CBS12 by viewer, Kayla.

A perfect day at the beach turns tragic as lifeguards jumped into rescue swimmers caught in rough currents, Sunday afternoon.

A CBS12 viewer sent us cell phone video after one person was pulled from the surf along Ocean Reef Park.

Beachgoers nervously looked on as first responders performed CPR on the distressed swimmer.

Three other swimmers were pulled from the water less than a mile away at City Beach Municipal Park.

Family members shared a photo of a teenage boy from Pahokee to CBS12, one of the four rescued.

Were learned late Sunday night the 14-year-old passed away.

Dwayne Watson with Riviera Beach Fire Rescue said strong rip currents may be to blame.

When youre dealing with open water incidents, you have the potential to have catastrophic consequences and use a safety conscious whenever youre out in the water, if you cant swim use common sense to stay near a life guard, said Watson.

Watson wants to remind beachgoers to pay attention to the warning flags posted along the beach.

It serves as a cautionary sign; it could save your life.

Always check to see if there are rip currents before you go out swimming. And just try to stay close to the shore as possible if you cant swim, said Watson.

The other near drowning victims on Singer Island were taken to area hospitals.

Investigators have not yet released their conditions or identities.

In addition to the four rescued in Riviera Beach, there were seven rescues in Palm Beach County. Palm Beach County Fire Rescue says two patients were rescued in Lake Worth Beach, four in Jupiter Beach, and one person at Burt Reynolds Park. The total ocean rescue efforts for Palm Beach County is 11 for Sunday.

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4 swimmers rescued on Singer Island, family says teen passed away - WPEC