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This June 21, 2009, file photo from the NASA Earth Observatory shows Saharan sand blowing off the coasts of Mauritania and Senegal. Although this image shows dust immediately off the coast of West Africa, a layer of dust from storms such as this often travels virtually intact to the other side of the Atlantic. This layer of dry, hot, dusty air is called the Saharan Air Layer.

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Saharan dust plume expected to hit Houston this weekend – Houston Public Media

June 28, 2025

NASA Earth Observatory This June 21, 2009, file photo from the NASA Earth Observatory shows Saharan sand blowing…