Garoo

A multidisciplinary volcanological and bio-anthropological study of the eruption products and victims, merged with numerical simulations and experiments, indicate that at Vesuvius and surrounding towns heat was the main cause of death of people, previously believed to have died by ash suffocation. The results of the study, published in 2010, show that exposure to at least 250 °C (482 °F) hot surges at a distance of 10 kilometres (6 miles) from the vent was sufficient to cause instant death, even if people were sheltered within buildings.

In case you watched the Pompeii trailer and managed to look away from Kit Harington’s abs long enough to wonder about historical accuracy.