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A rare weather event turned skies over Western Australia blood-red as Cyclone Narelle lifted iron-rich dust into the air, creating a dramatic spectacle explained by the science of light scattering.
Skies in Australia eerily turn blood-red
New Delhi: Residents in parts of Western Australia witnessed an unusual and dramatic sight as the sky turned a deep crimson hue ahead of Tropical Cyclone Narelle. The phenomenon, captured widely on social media, gave the landscape an almost apocalyptic appearance.
The striking colour change was caused by powerful winds associated with the approaching cyclone, which swept vast amounts of dust from the Australian Outback into the atmosphere.
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Scientists explain that the red sky is the result of a shift in how sunlight interacts with particles in the air. Under normal conditions, the sky appears blue due to Rayleigh scattering, where smaller air molecules scatter shorter blue wavelengths of light.
However, during this event, larger dust particles dominated the atmosphere, leading to Mie scattering. These particles, similar in size to the wavelength of visible light, scatter light differently filtering out blues and greens while allowing red tones to prevail.
NO, that's not a filter! ☁️🔴 The sky turned an eerie shade of red in Western Australia as dust filled the air ahead of Tropical Cyclone Narelle. pic.twitter.com/dCQ2hjFluI
— AccuWeather (@accuweather) March 28, 2026
The dust lifted into the air is rich in iron oxide, commonly known as hematite. This mineral naturally reflects red light, intensifying the crimson glow seen across the region.
The effect has often been compared to the reddish skies of Mars, where iron-rich dust similarly influences atmospheric colour.
Meteorologists have described Cyclone Narelle as an unusual system. It is among the few recorded storms to traverse multiple Australian coastlines, moving from Queensland through the Northern Territory before strengthening again near Western Australia.
Before landfall on March 27, the cyclone reached Category 3-4 intensity, bringing winds exceeding 125 km/h and heavy rainfall.
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While visually striking, such dust storms carry risks. High concentrations of airborne particles can significantly reduce air quality and visibility, posing challenges for transportation and public health.
Experts warn that climate change may increase the frequency of such events, as stronger cyclones and drier inland regions create ideal conditions for large-scale dust storms.
Researchers are also studying how iron-rich dust affects marine ecosystems. When deposited into the ocean, these particles can influence nutrient cycles, potentially impacting marine life in surrounding waters.
