Cornish drivers woke up on Sunday to fine a fine layer of dust coating their cars, which is thought to have traveled all the way from North Africa.
The fine yellow dust is the result of a big dust storm in the Sahara, around 2,000 miles away.
This is when dust is swept up in large amounts into the atmosphere, where it moved north due to the winds before it arrived over the UK.
The dust can get caught up in the rain droplets in clouds, which then fall to the ground. When the water evaporates, a thin layer of dust is left on surfaces, like cars.
Paul Hutcheon, Deputy Chief Forecaster at the Met Office, said: “We usually see this happen several times a year, particularly in summer when you get these big dust storms in the western Sahara."
See a Met Office explaination here: