Storms that ramp up so quickly complicate forecasting and make it harder for government agencies to plan for emergencies.

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

Erin is now a Category 3 hurricane with outer rainbands producing gusty winds and heavy rains across the Virgin Islands, ...

Hurricane Erin rapidly intensified into a Category 5 storm in the Caribbean, with winds reaching 160 mph. While not forecast ...

The Atlantic’s first hurricane of the season had maximum sustained winds of 160 miles per hour, forecasters said.

Hurricane Erin rapidly strengthened offshore to a “catastrophic” Category 5 storm on Saturday, as rain lashed Caribbean ...

Hurricane Erin rapidly exploded overnight from a Category 3 storm to a massive Category 5 and is expected to strengthen ...

Hurricane Erin rapidly intensified into an extremely dangerous Category 5 cyclone as it stayed safely north of the Caribbean ...

Hurricane Erin rapidly intensified from a tropical storm to a dangerous Category 5 hurricane in just 24 hours.

Hurricane Erin briefly strengthened into a Category 5 storm. It is not expected to make a direct hit on the U.S. but will create dangerous surf.

Forecasters said Erin should begin to slowly weaken as it increased wind shear. However, it's predicted to remain a major ...