Why skies in western France could turn orange this weekend
Sand from the Sahara could change the sky’s colour and pose health risks for those with respiratory conditions
Air quality may also see a deterioration, with PM10 levels increasing locally
Kirill Neiezhmakov/Shutterstock.
Saharan sand is expected to hit France by the end of the week alongside the temperature highs.
Summer-like conditions are predicted for this weekend in France, bringing warm weather after weeks of cool temperature. However, from Friday May 22 the heat will be accompanied by sand from the Sahara desert.
The sand will pass through Morocco and Spain, arriving in western France by Friday and becoming more dispersed across France during the weekend (with the highest concentrations likely expected on Saturday before gradually weakening).
These dust clouds, often carried at altitude by strong winds, can reduce visibility and leave a fine film of sand on cars, windows, and outdoor surfaces.
This pattern allows heat and Saharan dust to move northward over western Europe in warm south-westerly winds under high pressure.
When the Saharan sand reaches France, skies can take a hazy, milky or even orange tint, particularly during sunrise and sunset when the effect is most visible.
Air quality may also see a deterioration, with PM10 levels increasing locally (PM10 refers to airborne particles with a diameter of 10 micrometres or less, small enough to be inhaled), especially in southern and western regions.
Sensitive individuals such as people with asthma or respiratory conditions may be more affected during peak concentrations, and should be vigilant.
