If you are In SW Florida. South of Ft Myers. AND within 1 mile of the Water. Please make plans to go higher in your place of safety.
This is only a precaution at this time. I am basing this on Katrina's behavior. As we don't know what Wilma will do.

Lower your attic ladders, so you can access them quickly. If you have life preservers...Keep them close by.
Flashlights, battery operated radio and a chainsaw or other tools for cutting through the roof.

Don't forget bottled water and possibly some food.
It could be a while before Rescue Crews arrive.

This is very harsh posting...but under the current Rapidly Changing situation I feel it necessary to Post it.

Cell phones may not work, but take them with you.

There is also the high probability of wind damage to your attics and roofs.
Remember..Hide from the wind and Run from the water.

This is dramatic, but it might make a difference somewhere.