Tropical Storm Debby moves through Gulf toward Florida with hurricane warnings

MIAMI (AP) — Tropical Storm Debby strengthened rapidly Sunday and was expected to become a hurricane as it moved through the Gulf of Mexico toward Florida, bringing with it the threat of devastating floods to the southeast Atlantic coast later in the week.

The storm was likely to become a Category 1 hurricane before making landfall Monday in the Big Bend region of Florida, the National Hurricane Center in Miami said.

From there, the storm is expected to move eastward over northern...