Hurricane Ian has strengthened, with winds now at 85 mph, as it continues to move northward off the east coast of Florida.

The forecast track has shifted a little farther north with the latest advisory at 11 p.m. ET, putting cities like Myrtle Beach, S.C., in the storm's path for worse impacts, while less impact could be seen in Charleston.

Wind Gusts up to 90 mph are possible in Myrtle Beach on Friday afternoon, as Ian is expected to make landfall toward the south. Much of Georgia to the Carolinas will experience wind gusts over 50 mph.

-ABC News' Riley Winch

Despite water receding in Fort Myers following Hurricane Ian's destructive path across Florida, 80% of the city is still without power, while 70% is without water, Mayor Kevin Anderson told ABC News Live Prime.

Anderson said the most important thing is to get electricity and water back up and running for residents, especially since it's still hot and humid in the area and people need air conditioning and water.

"Tomorrow, we're expecting the delivery of the pods with the water and food and ice and we'll be setting up delivery stations," he said. "Again, the problem is it's very, very difficult to live here without air conditioning."

Fort Myers has performed about 200 rescues and counting, according to the mayor.

"The crews were out and they're probably still out there working now, getting the roads cleared and getting the roads where they're traversable so that emergency vehicles can respond," Anderson said.

Eva Neocleous, her mother, Aurora, and dog, Primi, waited more than 24 hours to get rescued from their Fort Myers home in the aftermath of Hurricane Ian.

The family first called for help at 11 a.m. on Wednesday, but conditions were too dangerous for first responders at the time. Nobody came until the Cajun Navy pulled them out around 12:30 p.m. Thursday.

Neocleous said the ordeal was terrifying: "I thought I was going to die right there."

-ABC News' Rachel DeLima, Andrew Fies and Victor Oquendo

There have been more than 700 confirmed rescues in the aftermath of Hurricane Ian slamming Florida, Gov. Ron DeSantis said Thursday.

The Sanibel Causeway, which suffered significant damage in the storm, will most likely need to be rebuilt entirely, he said.

There were more than 2.3 million customers without power in the state just before 9 p.m. ET Thursday.

-ABC News' Darren Reynolds

Tropical Storm Ian has weakened slightly, but it is expected to not only strengthen but rapidly intensify overnight as it travels over warm waters in the Caribbean.

As of 5 p.m. ET, the storm system had maximum sustained winds of 45 mph and was moving west-northwest at 12 mph, with the center located about 220 miles away from Grand Cayman.

Dry air ahead of the storm has delayed the strengthening trend so far. But the rapid intensification is expected to occur Monday into Tuesday as the system continues across the northwestern Caribbean and closes in on western Cuba.

Over the next 24 hours, the outer bands will impact Jamaica and the Cayman Islands, bringing rounds of heavy rain, possible flash flooding and storm surge. Later Monday and into Monday night, Ian will be closing in on western Cuba and will likely bring significant wind and storm surge impacts to the region.

A hurricane warning is in effect for Grand Cayman and portions of western Cuba. A tropical storm watch has been issued for portions of western Cuba, as well as the lower Florida Keys, including Key West.

As of 5 p.m., the forecast track was nudged slightly eastward. Overall, the forecast guidance variability and uncertainty will remain high, and the track for where the storm will be from the middle to the end of the week will continue to shift over the next 24 to 48 hours.

-ABC News' Dan Peck