PORT-AU-PRINCE, Haiti—Marco became a hurricane over the Gulf of Mexico Sunday on a path toward the Louisiana coast. Tropical Storm Laura battered the Dominican Republic and Haiti and headed to the same part of the U.S. coast, also as a potential hurricane.
It would be the first time two hurricanes form in the Gulf of Mexico simultaneously, according to records dating to at least 1900, said Colorado State University hurricane researcher Phil Klotzbach.
