By Mary Gilbert, Allison Chinchar, Rebekah Riess, Andrew Freedman, CNN (CNN) — Powerful Hurricane Erin has undergone astonishingly rapid changes in its intensity — a phenomenon that has become far ...

Hurricane Erin, the first hurricane of this year’s Atlantic season, is a Category 3, the United States National Hurricane Center (NHC) said, downgrading the storm from Category 4 as the wind speed ...