Dust Devils form when hot gases near the ground rise quickly through a small pocket of cooler, low-pressure gases above it. They become a vortex of dust and particles caught by these gases and form a visible pillar that moves and twists.
Martian dust devils can be up to fifty times as wide and ten times as high as dust devils on Earth, and they pose a threat to any technology within their vicinity as they tend to cover everything around them with dust.