A rip current is a narrow, fast-moving channel of water that starts near the beach and extends offshore through the line of breaking waves.
If you do get caught in a rip current, the best thing you can do is stay calm. It’s not going to pull you underwater, it’s just going to pull you away from shore.
Remember, always let a lifeguard make the rescue. Most people who go out and try to rescue someone who gets caught in a rip current, ends up drowning. The best way to help is to throw them something that floats and immediately get a lifeguard for help.