Tropical Storm Erin is strengthening and could become a Category 4 storm with 130-mph winds within three days.

Tropical Storm Erin is forecast to strengthen into a hurricane on Friday, Aug. 15, according to the National Hurricane Center ...

Tropical Storm Erin is expected to become a hurricane later today, Aug. 15, and a Category 4 hurricane with maximum sustained winds of 130 mph over the weekend. A major hurricane is a Category 3 or ...