Ian has become a post-tropical cyclone, but winds remain at 70 mph and the "dangerous storm surge, flash flooding and high wind threat continues," the National Hurricane Center said in its latest bulletin.

Hurricane warning and watch areas have now been discontinued, though a tropical storm warning has been issued from Edisto Beach, South Carolina, to Cape Fear, North Carolina.

Floridian Hanna-Kay Williams started to experience contractions late Tuesday evening, just as the Orlando area was experiencing signs of the hurricane to come.

So she braved the strong winds and potentially dangerous flooding to get to a hospital after she went into labor during Hurricane Ian.

"I was going in and out because the car was swaying in the wind and the rain was intense, but my fiancé is a great driver so I was in great hands," Williams, 22, of Melbourne, told ABC News.

Read more about the account here.

-ABC News' Mary Kekatos

Hurricane Ian made landfall in South Carolina Friday afternoon as a powerful Category 1 storm, bringing damaging winds and life-threatening storm surge.

Ian made landfall near Georgetown. The storm is expected to move further inland across eastern South Carolina and central North Carolina through the night and into Saturday.

After making landfall, it is expected to weaken and rapidly transition into a post-tropical cyclone overnight. It is forecast to bring heavy rain to North Carolina and Virginia and up through the Northeast on Saturday.

Rainfall rates have been up to 2 inches per hour with heavy rain bands in the Charleston area. Wind gusts up to 92 mph have been recorded.

President Joe Biden spoke from the White House Friday afternoon about Hurricane Ian's wrath, describing the devastation in Florida as well as warning residents of South Carolina to be prepared for another landfall.

"We're just beginning to see the scale of that destruction," Biden said of the damage in Florida. "It is likely to rank among the worst in the nation's history. You have all seen on television, homes and property wiped out. It is going to take months, years to rebuild."

He added, "I just want the people of Florida to know we see what you are going through and we are with you. And we are going to do everything we can for you."

Biden said the U.S. Coast Guard has mobilized 16 helicopters, 18 rescue boats and six fixed-wing planes to help in search and rescue in Florida. More than 100 people have been rescued by the Coast Guard, Biden said. Hundreds more have been rescued by volunteers.

"The federal government will cover every cost, 100% of the cost, to clear the massive debris left in the wake of the hurricane and these counties," the president said. "It all needs to be cleared out for communities to begin the hard work of trying to get back on their feet."

As Ian approaches, here are a few commonsense strategies to help avoid unnecessary risk from floodwaters:

--Before flooding, look up your neighborhood's flood zone and determine if your home or business is prone to flooding. Come up with an evacuation plan and make sure your car has a full tank of gas. Stock up on non-perishable foods.

--After flooding, ensure your drinking water is sanitized and wash your hands thoroughly after contact with floodwaters. Disinfect objects that have come into contact with floodwater before offering them to children or toddlers.

--Try to avoid exposure with floodwaters for long periods of time to prevent physical injury. Wear waterproof boots if you have them. Do not attempt to drive over flooded streets as it could damage the car and strand passengers.

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