I moved from Charleston about a month ago, but my entire immediate and extended family is still there and literally none of them evacuated. My parents live Downtown and apparently most of the neighborhood is staying around too. They all rode out Hugo, so the mentality is that it couldn't possibly get any worse. Of course, most Charlestonians (including my family) did attempt to evacuate during Hurricane Floyd but it was absolutely botched - and then the hurricane didn't even cause major flooding. I think it took us 9 hours just to get to Columbia on backroads. Others had it far worse. So maybe a bit of that factoring into their decision making process, although everything appears to have gone swimmingly with the reversal of I-26. Kudos to Nimrata on that one.
Will be watching this one real close.