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Daniel Swain in Wired: Oh Good, Now There’s an Outbreak of Wildfire Thunderclouds

Huge pyrocumulonimbus clouds just formed over fires in the West. Here’s why they could become more common on a warmer planet. “If there is an increase in these clouds, the most plausible reason would be an increase in the intensity of the wildfires themselves,” says Swain. Indeed, the places that are seeing more of the clouds—Australia, North America, Siberia—are also seeing fiercer wildfires.