Described by NASA as the 'fire-breathing dragons of clouds', fire clouds – or pyrocumulonimbus – are huge storm clouds reaching up to 15km into the atmosphere. ⁣ ⁣ Generated by the immense heat released from wildfires, they become a problem in Europe as blazes continue to tear through Spain and France. ⁣ ⁣ Discover more about how and why they form in this video.⁣ ⁣ #FireCloud #Pyrocumulonimbus #EuropeWildFires⁣