It quickly powered up from a tropical storm to a Category 5 in a single day, the National Hurricane Center said.

Hurricane Erin exploded in strength to a Category 5 storm in the Caribbean on Saturday, rapidly powering up from a tropical storm in a single

Powerful Hurricane Erin has undergone a period of astonishingly rapid intensification — a phenomenon that has become far more common in recent years as the planet warms. It is now a rare Category 5, churning through the Atlantic Ocean north of the Caribbean.