SAN FRANCISCO — The search was called off Monday for a teenager whose parents were killed after they plunged into the cold, powerful surf in Northern California in a nightmarish chain of events that started when their son tried to save the family dog from drowning.

Eureka residents Mary Elena Scott, 57, and Howard Gregory Kuljian, 54, both drowned Saturday, said Ariel Gruenthal, a deputy coroner in Humboldt County. The boy, Gregory James Kuljian, has not been found and is presumed dead.