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Amidst the devastation of a huge wildfire in the US state of California, photos have emerged of a rare force of nature.
Firenadoes, torrents of wind and flame that burn at extreme temperatures, have been spotted in the hills near San Bernardino, 60 miles (96km) east of Los Angeles.
The whirlwinds form when a fire heats air above it and pulls in cool air at its base, creating a self-sustaining vortex. When large enough, these swirling columns are capable of ripping trees from the ground and pulling roofs off houses.
California's inferno currently spans 58 sq mi (150 sq km) in a dry, drought-ridden region of hills. More than 82,000 people have evacuated their homes. Only 22% of the fire has been contained.
Firefighters tend to avoid firenadoes due to their extreme heat and volatility. They instead focus on tackling more stable areas, where the movement of a fire can be safely predicted.
Comment: Some other rare firenadoes observed over the last couple of months include: