Hurricane Maria
With a dangerous hurricane slamming into the island, it'll need help from the mainland to recover.
The U.S. territory is still dealing with the consequences from Hurricane Irma.
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WHAT'S HAPPENING
Puerto Rico is expecting a storm unlike anything else in "modern history," its governor said.
The hurricane has intensified into a Category 5 storm, and threatens a number of islands including Puerto Rico and the U.S. and British Virgin Islands.
Islands still reeling from Irma are bracing for another devastating hit.