Blood rain, a rare weather phenomenon, is affecting parts of Southern Europe this week as Saharan dust from Africa sweeps across the region.
The unusual weather occurrence commenced on Saturday, carrying dust northward over Spain and Portugal, leading to occurrences of blood rain in Spain, France, and the United Kingdom. The dust has already caused red-hued skies and striking sunsets in the area.
Blood rain happens when dust particles from the Sahara Desert are lifted by the wind into the atmosphere. These tiny particles mix with rain, causing the rainwater to take on a red or reddish-brown hue, resembling blood falling from the sky. This phenomenon, also known as mud rain or dirty rain, only transpires a few times a year under specific conditions.
Following the rainfall, layers of dust are left on outdoor surfaces like lawn furniture, sidewalks, homes, and vehicles. Saharan dust and the ensuing mud rain can heighten air pollution levels and aggravate respiratory and cardiovascular problems.
The National Oceanic and Atmospheric Administration (NOAA) indicated that the dusty air contains around 50% less moisture than the usual atmosphere, hindering cloud formation and thunderstorm activity.
While blood rain can occur globally, it is more prevalent in regions closer to the Sahara Desert, such as northern Africa and Southern Europe. Experts note that the impact in the U.S. is typically less severe than in Europe due to the greater distance and time the dust particles have to traverse, allowing for dispersion.
NOAA estimates that over 180 million tons of dust leave Africa annually. The FOX Forecast Center anticipates the rare weather event to conclude by Wednesday morning.
Follow FOX Weather for updates on the ongoing impact of blood rain in Europe.
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