From the article cited below, "there might have turbocharged 'hypercanes' of almost unbelievable intensity assaulting the supercontinent Pangaea—the result of runaway global warming." Also bear in mind that the supercontinent Pangea was assumed to be habitable almost exclusively along its coasts, with an immense desert covering most of its non-coastal land. So if life was mostly concentrated along the coasts and the coasts are constantly getting slammed by hypercanes... yeah, not good.
Certainly lots of things contributed to the Permian extinction. Some have referred to it as the "Murder on the Orient Express" extinction: everything caused it. Pangea, an asteroid impact or two, volcanoes, methane releases from the ocean floor, maybe even a gamma ray burst hit the Earth too. The sheer scale of death seems to imply multiple causes. But regardless of what the primary causes were, the hypercanes part of it always fascinated me.
[1] https://www.theatlantic.com/science/archive/2017/07/a-road-t...