Building on arguments and warnings that climate campaigners and experts have shared for years, a pair of scientists on Monday published a research article exploring the “growing inadequacy” of the Saffir-Simpson Hurricane Wind Scale and possibly adding a Category 6. Global heating—driven by human activities, particularly the extraction and use of fossil fuels—is leading to stronger, more dangerous storms that are called hurricanes in the North Atlantic and Northeast Pacific, typhoons in the Northwest Pacific, and tropical cyclones in the South Pacific and Indian oceans. The Saffir-Simpson scal…