A young New Zealand woman holidaying in Samoa is dead and another person is missing after they were swept away in a flash flood.Six members of a Samoan family who live in New Zealand were caught in the flood while swimming in the Vaisigano River near Apia.Four are in hospital and one is still missing.Radio New Zealand’s correspondent, Tipi Autagavaia, told Morning Report the family arrived in Samoa just two days ago.He says it appears they were having a casual swim when the flood came out of nowhere.