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.
Hyercane sounds like sci fi.
I hypothesize that hypertornados would go along with it, and since we're speculating about things that could be triggered by large asteroid impacts, I imagine there will be hyperquakes, too. We could call the long, cold period after hyperwinter.
This link is stupid.
Even then, the link requires that the troposphere remains at a relatively normal temperature, which rules out ejecta heating. I just don't see a mechanism.
The ocean temperature necessary to support a hypercane is high enough to cause third degree burns in around 10 minutes and second degree burns in around 20 minutes.
I think you got those mixed around :-)
Anything greater than 98.6F/37C will cause body temperature to rise, and you can't expect to cool off by sweating when the neighborhood is underwater.
Water at 120C would not be an ocean, it would be steam.