Mount Vesuvius erupts in 1944 in southern Italy

The transcript describes the intense heat and movement of white-hot lava, which flows down a volcano's sides at 2500 degrees, capable of incinerating everything in its path. The lava spreads as a vast sea of molten rock, wide and deep enough to cover large areas, such as New York's Central Park, with a thick layer.

What effect did the lava have on anything in its path?

Describe the movement of the lava as mentioned in the text.