According to the Huffington Post, a fire department spokeswoman in the catalonia region said the cloud was caused when chemicals that were being delivered to a warehouse in the city of Igualada mixed, setting off an explosion.

The Catalan commissioner for interior affairs told El Pais that the cloud is taking longer to disperse than expected because there's not enough wind in the area.

In addition to staying inside, and keeping windows shut, El Pais is reporting that parents are to not pick up their children from school.

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In this file photo from October 2024, Atlanta Braves outfielder Jorge Soler and teammates react after losing to the San Diego Padres 5-4 in San Diego. The Braves and Soler, who now plays for the Los Angeles Angels, face a lawsuit by a fan injured at a 2021 World Series game at Truist Park in Atlanta. (Jason Getz/AJC)

Credit: Jason.Getz@ajc.com