The rapidly developing hurricane that shows no signs of stopping won’t technically become a Category 6 because the category doesn't exist at the moment. But it could soon reach the level of a hypothetical Category 6 experts have discussed and stir up arguments about whether the National Hurricane Center’s long-used scale for classifying hurricane wind speeds from Category 1 to 5 might need an overhaul.

But that kind of rapid intensification is frightening. If it keeps going, would Category 5 be enough to describe it? Do we need to add a Category 6? Some experts say yes, but don't expect to see one any time soon.