Hurricane Ian updates: Florida death toll climbs
Lee County, which encompasses Fort Myers, accounts for most of the fatalities.
The remnants of Ian are charging up the East Coast on Saturday after making landfall as a Category 1 hurricane in South Carolina on Friday afternoon.
The monster storm made its first U.S. landfall on Wednesday on Florida's west coast as a powerful Category 4 hurricane, shredding homes with ferocious winds topping 150 mph. Florida's death toll has climbed to at least 81, according to information from local officials.
Latest headlines:
As flooding begins Charleston police urge 'only essential travel'
Hours before Hurricane Ian is expected to make landfall in South Carolina, Charleston police are urging "only essential travel" and announcing road closures.
"We are experiencing flooding in many of our usual locations and implementing road closure procedures. We expect additional closures throughout the day," police said in a tweet.
Flash flood warning issued for Charleston, South Carolina
The National Weather Service has issued a flash flood warning for the Charleston metro area until noon on Friday.
The NWS says that heavy rain and tide will continue to increase and cause life-threatening conditions and flash flooding.
-ABC News' Max Golembo
Florida governor set to hold early morning press conference on Hurricane Ian
Florida Governor Ron DeSantis will hold his next press conference at 8:45 a.m. ET, according to a media advisory provided by his office.
DeSantis will be joined by FEMA administrator Deanne Criswell.
-ABC News' Ahmad Hemingway
Biden declares state of emergency in South Carolina
President Joe Biden has declared a state of emergency in South Carolina, the White House announced late Thursday night, as Hurricane Ian takes aim at the state.
-ABC News' Lauren Minore
Gulf Coast, Tampa Bay area particularly vulnerable to hurricanes, expert says
Tropical Storm Ian is marching toward the Gulf Coast of the U.S., a region quite vulnerable to hurricanes.
The underwater geology of the Gulf of Mexico is what makes the Gulf Coast particularly unguarded to the massive influx of seawater, said Michael Brennan, acting deputy director of the National Hurricane Center, according to an article on Inside Science.
The symmetry of the Gulf of Mexico, with its shallow, sloping continental shelf, allows the storm surge to be pushed even higher onto land, Brennan told the outlet.
Because the land around the Gulf Coasts is typically flat, that exacerbates the flooding even more and allows the storm surge to travel farther inland, Brennan said.
"Of all of the hazards of hurricanes --- winds, rain, storm surges –-- surges are what can cause the largest loss of life," Brennan told Inside Science.
The Tampa Bay-St. Petersburg area, one of the regions bracing for Ian, is especially vulnerable to storm surge flooding but has avoided a direct hit from a strong hurricane since 1921.
Editor's Note: This post has been updated to reflect proper attribution to Inside Science.
-ABC News' Max Golembo