A “strange” reddish sky and red-looking sun have been seen over many parts of England.
The phenomenon was first seen in the west of England and Wales before spreading to different areas.
BBC weather moderator Simon King said it was because of the leftovers of Hurricane Ophelia dragging in tropical air and dust from the Sahara.
He included that remains from wood fires in Portugal and Spain was also having an impact.
The dust has caused shorter wavelength blue light to be scattered, influencing it to seem red.
He stated: “Ophelia began in the Azores where it was a typhoon and as it followed its direction northwards it dragged in tropical air from the Sahara.”
This implied dust from the Sahara was carried with it, he said.
“The dust is picked up into the air and goes high up into the atmosphere, and that dust has been dragged high up in the air over the UK,” Mr King clarified.
The dust particles in the air make blue light disperse, leaving longer-wavelength red light to radiate through.