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What Is a Fire Cloud and How Are They Making Europe's Wildfires More Dangerous?

The beach of Moutchic in Lacanau, southwestern France, as clouds of smoke rise into the sky from the Gironde wildfire on July 24, 2026. —Maximilien Lamy––AFP/Getty ImagesFerocious wildfires in France and Spain have prompted the evacuation of hundreds of thousands of people, as firefighters battle against changing winds to keep the blazes under control.An added difficulty has developed in France thanks to the emergence of a rare meteorological phenomenon—a pyrocumulonimbus, more commonly known as a "fire cloud." Officials in the badly-impacted Gironde region, near Bordeaux, confirmed the format...

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