Two swimmers are trapped in a rip current; lifeguards patrol the world famous U.S. Open of Surfing contest.

Several dozen swimmers must be rescued from a strong rip current; lifeguards defuse a surfer fight at a popular surf spot.

Newport Beach lifeguards help at "The Wedge"; a San Diego lifeguard searches for a man in a lake.

A surfer who's been underwater for several minutes; a man collapsed from eat exhaustion.

A huge swell makes for a busy day; California lifeguards compete.

San Diego lifeguards search for a missing swimmer; Newport Beach lifeguards rush to save a drowning boy.

San Diego lifeguards spend the off-season in New Zealand; battling stingrays in La Jolla.

Rescuers use a helicopter to save a 16-year-old boy; a child goes missing.

Lifeguards race to save a diver whose heart has stopped; two sisters are stranded on a cliff.

Lifeguards and paramedics work to save a heart attack victim; spear fisherman become trapped.

A 14-foot great white shark is spotted by a lifeguard; four sisters follow their family's lifeguard tradition.