Photos: Red sky wows the UK in the midst of Ophelia
The phenomenon was initially seen in the United Kingdom before spreading to other areas. The red appearance of the sun is due to Ophelia dragging in tropical air and dust from the Sahara. The dust gets picked up into the air and goes high up into the atmosphere. The particles in the air cause blue light to scatter, leaving longer-wavelength red light to shine through. Debris from forest fires burning in Portugal and Spain is also playing a part.
A stunning, red-tinted sky sent social media abuzz in the United Kingdom on Monday as former Hurricane Ophelia impacted the region.
This was no Instagram filter, however.
Awe-stricken residents of England and Wales were treated to the picturesque sight of a blazing red sun, which doused the sky with a captivating orange glow.
The unusual phenomenon undoubtedly had many people wondering: Why is the sky so red?

The sun gave off a reddish glow over London on Oct. 16, 2017. (Instagram photo/dorishell)
“Is it Ophelia or is it the dust from Africa? The answer is it’s both,” said AccuWeather Meteorologist Tyler Roys.
“Ophelia came from south of the Azores and moved northward, and it pulled the dust up from North Africa up along with it,” Roys said.
The southern dust and smoke from wildfires in northern Iberia scattered blue light from the sun, which allowed more red light through, according to the Met Office.
The uniquely orange sky was mainly visible in the morning into the early afternoon on Monday as the dust plume moved through the area.
The timing for dust to be visible in the U.K. is rare, according to Roys.
“The best time for the U.K. to see dust in the sky is during the height of summer, when they have more of a southerly wind that is drawing the warmth up,” he said.
Hazy sunshine as a result of dust is not uncommon during summer across parts of the Mediterranean, including Portugal, Spain and Italy.
Clouds from Ophelia helped make this particular occurrence so unique.
“During the summer months, there are few clouds roaming around southern Europe, which is why we typically don't see the orange sky more often,” Roys said.
“As for other areas, the dust is always roaming across North Africa and the Middle East, which helps create the orange sky at dusk; otherwise, it is not a very common thing elsewhere across the world,” he added.

A dusty red sky is visible over England on Oct. 16, 2017. (Instagram photo/girardimoore)

A red sun illuminates the sky over England on Oct. 16, 2017. (Instagram photo/audiogeorge)

Instagram user Edward Foley captured a "foreboding sky" over Wimbledon Common in London, England, on Oct. 16. 2017. (Instagram photo/wimbledonagent)

The red sun was visible over the University of Manchester in England on Oct. 16, 2017. (Instagram photo/david_gennard)

Instagram user Robert Falla-Louvét captured this image of a glaring red sun over the Midlands in England on Oct. 16, 2017. (Instagram photo/lanerobertlane)

A reddish sky could be seen from central London, England, on Oct. 16, 2017. (Instagram photo/adao8)