Complex sentence: The largest wave at Merak was estimated to be at least 41 m (135 ft) high, and approximately 2,700 people lost their lives, including virtually all of the town's inhabitants at that time.
Split into simpler sentences: The largest wave at Merak was estimated to be at least 41 m (135 ft) high. Approximately 2,700 people lost their lives, including virtually all of the town's inhabitants at that time.