When Mount Vesuvius erupted in 79 AD, the devastation it caused was unprecedented. Around 2,000 people died in Pompeii and 300 are known to have died in Herculaneum, however, the entire death toll could have been around 16,000.

The exact death toll of the eruption of Mount Vesuvius in 79 AD remains a subject of intense archaeological debate, but modern estimates suggest that approximately 2,000 people perished within the city walls of Pompeii alone. When considering the wider region, including Herculaneum and smaller coastal villas, the total number of victims is estimated to be around 16,000. Contrary to the popular image of everyone being instantly encased in ash, research shows that a significant portion of the population—perhaps as much as 80% to 90%—actually managed to flee the city during the initial phase of the eruption when light pumice stones began to fall. Those who stayed or returned were killed on the second day by pyroclastic flows, which were high-speed clouds of superheated gas and volcanic matter that caused near-instantaneous thermal shock. Ongoing excavations in 2026 continue to uncover remains in previously unsearched sectors of the city, slightly refining these numbers as archaeologists find more victims who were trapped in buildings or overwhelmed while trying to escape through the ash-choked streets.