Hypercanes would be pretty intense; wind speeds of 500 mph would destroy most buildings, and almost all skyscrapers (which are not built to withstand such lateral loads).
Almost all skyscrapers? Are there skyscrapers out there that wouldn't be leveled by a 500mph wind!?
300 mph tornados tear up everything except some roadways, foundations and deeply-driven steel pilings. 500 mph would just make a messier mess. If that were multiplied over continental size, that would definitely extinct some species.