Summary
Hurricane Ian made landfall for a second time in the US after devastating Florida - hitting South Carolina's coast
Forecasters predicted a storm surge and floods, with the historic city of Charleston likely to feel the brunt of the storm
It was downgraded from a category one hurricane to a post-tropical cyclone, and was expected to weaken further overnight
President Joe Biden approved an emergency declaration for the state, meaning recovery funds can be sent more quickly once the hurricane passes
Ian first made landfall in Florida on Wednesday near the city of Fort Myers and brought flooding, high winds and storm surges
At least 21 people may have died in the state, officials say, but exact casualty figures are still being determined
More than 2.6 million Florida homes and businesses have no electricity and some areas have been left submerged