Isaac Expected to Become Hurricane as It Hits Florida

Florida Gov. Rick Scott declared a state of emergency and officials urged vacationers to leave the Florida Keys.

Tropical Storm Isaac swept across Haiti's southern peninsula early Saturday, bringing flooding and at least three deaths while adding to the misery of a poor nation still trying to recover from the terrible 2010 earthquake. At least three people were reported dead.

Forecasters expect the storm, which is packing heavy rain and 60-mph winds, to move over Cuba today and become a hurricane tomorrow.

Florida Gov. Rick Scott declared a state of emergency and officials urged vacationers to leave the Florida Keys, after forecasters expanded hurricane warnings and watches for parts of Florida, just as the Republican Party gathers for its national convention in Tampa.