This link is to the flood maps with evacuation zones by county:
Looks like my friends are in Zone D, not very far from Zone C. My recollection is that it is a very flat area.
Wow. Our good friends are in the RED Zone A in South Venice, and they refuse to leave. They're about 10 minutes from Caspersen Beach, and there is an inlet / river a couple blocks from their house.
I pray they make it through this hurricane, but I think the storm surge (from all that water around them) may destroy their house. Hope I'm wrong...