A pyroclastic flow is a dense, fast-moving flow of solidified lava pieces, volcanic ash, and hot gases. It is extremely dangerous to any living thing in its path.

What does pyroclastic flow do to humans?

On the margins of pyroclastic flows, death and serious injury to people and animals may result from burns and inhalation of hot ash and gases.

Can you survive a pyroclastic flow?

I know, the odds of surviving this episode may seem impossible. But believe it or not, people have managed to survive a pyroclastic flow. ... You should still be driving your car at this point, but if the pyroclastic flow gets near you, you'll begin to feel the heat. These things can be as hot as 700°C (1,300°F).