Riding out IKE

We are here in Houston waiting for IKE to hit. Where we live is not in an evacuation zone, but have been told to stay put. Galveston Island, where my husband's office is, is where IKE will hit landfall. How much of the island will go under water, we don't know. But the downtown strand area is already flooded according to a friend of ours who lives on the island and just left a few hours ago for safer ground here in Houston.