Hurricane Irma is one of the most powerful storms to slam the Atlantic Ocean. Here's what you need to know.

When its maximum sustained winds hit 185 mph on Tuesday, Sept. 5, Hurricane Irma became one of Atlantic Ocean's most intense storms on record. 

The storm appears to be destined to target the U.S., with Florida at particular risk of seeing landfall over the weekend, but not before the storm wreaks havoc from the Lesser Antilles in the Caribbean to Puerto Rico, Dominican Republic, and Cuba. Read more...