Here's a good overview of the potential effects that Wilma could bring to southwest Florida. If it tacks south of Marco Island, the wind and storm surge would be worst in mostly undevoped costal areas near Everglades City.

If it comes in between Marco and Naples it will not be good news for Marco, with high winds and a possible 15 foot storm surge.

Voluntary evacuations are in effect and mandatory evacuations are expected in costal areas, including Marco Island, by Thursday. Once the wind starts, the bridges will be dangerous to cross, although there are no plans to close them.

But as the advisory notes, despite the consistency of the computer models, dramatic changes could take place and hopefully, Wilma will stall out and weaken in the Gulf.

Here's more from The Storm Track site.