on after being pulled from the surf by bystanders.

What they're saying:

The National Weather Service and local public safety agencies have issued high surf warnings for regional beaches.

Officials have repeatedly urged the public to exercise extreme caution near the shoreline, warning that  powerful water conditions while near the shoreline  can easily catch beachgoers off guard.

A Beach Hazards Statement issued by the National Weather Service warned of increasing wave heights and rip currents that can quickly pull a swimmer away from shore.

What you can do:

Beachgoers are strongly advised to keep a safe distance from the shoreline and avoid low-lying rock formations or wet sand where rogue waves can hit.

Given that the high surf is not expected to subside until Thursday afternoon or evening, local authorities urge the public to obey all posted warning signs and stay out of the water in areas with heavy shore breaks.

Los Angeles County lifeguards advise anyone entering the water  to understand the risks and assess conditions by talking to a lifeguard before getting into the surf.

 There is an increased risk of ocean drowning,  the National Weather Service stated.  Rip currents can pull swimmers and surfers out to sea. Waves can wash people off beaches and rocks and capsize small boats near shore. 

Rock jetties and groins can be particularly dangerous during such conditions, with a high risk of being washed into the water, according to the NWS.