Dirty rain

Rain carrying sand from the North African desert fell on Portugal, especially in the Algarve and Lisbon and Algarve, on August 8.

Meteorologist Pedro Vieira said: “This natural phenomenon is a result of winds from the east carrying dust from the North of Africa.”

Another factor that can lead to this kind of “dirty rain” is high temperatures that produce a low occurrence of precipitation resulting in a greater concentration of dust and sand.