We talk about making sure you have you medications available during an emergency. Something I had not given a lot of thought about was would your doctor be available. In something like Katrina or Sandy almost everyone is impacted. This include medical staff.
Hurricane Sandy Disconnects Evacuated Patients From Comfort of Predictability
So if you are being treated for a medical condition you should give some thought to how you will continue treatment during an emergency. In some cases it may have been advisable for some people to have made arrangement for treatment outside of the storm area. They may have stayed with relatives or friends, etc. Right now I am hearing about elderly people basically trapped in their apartments or homes. In such a situations it may be unlikely that they are receiving their normal medical care.