Hurricane Ian updates: Florida death toll climbs

Flooding has hit several parts of the Orlando area, including Seminole, Osceola, Lake counties and other neighboring areas.

ABC News' Orlando affiliate WFTV said that first responders in Kissimmee rescued at least one person from a couple of vehicles that had been partially submerged during a storm surge overnight.

It is unclear how severe the damage is in the area but witnesses reported heavy and sustained wind and rain throughout the overnight hours.

-ABC News' Ahmad Hemingway

A flash flood emergency was declared in areas north of Orlando as the region was hit by about a foot of rain, the National Weather Service said.

The declaration covered Sanford, Lake Mary and Heathrow, the service said. Nearby Central Orange, Seminole and South Central Volusia were also under flash flood warnings.

“This is a particularly dangerous situation,” the service said. “Seek higher ground now! Life threatening flash flooding of low water crossings, small creeks and streams, urban areas, highways, streets and underpasses.”

Parts of the region have seen more than 16 inches of rain within 24 hours, with more than 9 inches in the last six hours, making the storm a 1,000-year flood event in the Orlando area and to the north.

-ABC News’ Max Golembo and Kenton Gewecke

More than 2.5 million customers were without power in Florida at about 5:30 a.m. on Thursday, the state’s providers said.

Ian’s winds slowed to 65 mph early on Thursday morning, downgrading the system to a tropical storm, the National Hurricane Center said.

“The Hurricane Warnings along the east and west coasts of the Florida peninsula have been changed to Tropical Storm Warnings,” the center said.

-ABC News’ Max Golembo