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

Hurricane Erin has strengthened into a Category 2 storm as it approaches Puerto Rico and the Virgin Islands, bringing heavy ...

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

SAN JUAN, Puerto Rico (AP) — Erin strengthened into a powerful Category 4 hurricane in the Caribbean on Saturday and ...

Hurricane Erin is likely to restrengthen again as it passes east of the Turks and Caicos Islands and the southeast Bahamas on ...