HORSESHOE BEACH, Fla. (AP) — Tropical Storm Debby moved menacingly into some of America’s most historic Southern cities and was expected to bring prolonged downpours and flooding throughout the day Tuesday after slamming into Florida and prompting the rescue of hundreds from flooded homes. Record-setting rain from the storm that killed at least five people was causing flash flooding, with up to 30 inches (76 centimeters) possible in some areas, the National Hurricane Center said.

The storm’s center was over southeast Georgia early Tuesday with maximum sustained winds near 45 mph (75 kph) and it was moving northeast near 7 mph (11 kph). The center is expected to move off Georgia’s coast later Tuesday. Some strengthening is forecast Wednesday and Thursday as Debby drifts offshore, before it moves inland Thursday over South Carolina.

“Hunker down,” Van Johnson, the mayor of Savannah, Georgia, told residents in a social media livestream Monday night. “Expect that it will be a rough day” on Tuesday, he said. More than 6 inches (15 centimeters) of rain had fallen through Monday at Savannah’s airport, but more rain fell overnight and was continuing Tuesday, the National Weather Service reported.

Flash flood warnings were issued in Savannah, Georgia, and Charleston, South Carolina, among other areas of coastal Georgia and South Carolina. Both Savannah and Charleston announced curfews Monday night into Tuesday. In South Carolina, Charleston County Interim Emergency D.