Proposal would add a "Category 6" as hurricanes get stronger

Hurricanes are getting so strong in a warming world that a Category 6 intensity should be added to the Saffir-Simpson Hurricane Wind scale, a new study finds.

Why it matters: The research shows how significantly climate change is altering storm intensity and other characteristics, as well as further underscoring the limitations of the scale.

Reality check: The paper, published Monday in the journal Proceedings of the National Academy of Sciences, does not represent an official move by the National Hurricane Center to add another hurricane category.