Hurricane Irma headed for Caribbean and possibly the U.S.

MIAMI -- A hurricane in the Atlantic is strengthening as it moves toward the Caribbean and possibly the U.S. next week.Irma was named a tropical storm on Wednesday morning, but grew to a Category 3 hurricane by Thursday afternoon, with winds reaching 115 mph.Hurricane Irma is forecast to continue to strengthen into a Category 4 storm as it approaches the Caribbean next Tuesday.Irma comes on the heels of Hurricane Harvey, which struck the Gulf Coast of Texas on Friday. Thousands have been displac