Great article at nytimes.com about what snowbirds should do to prepare their homes and properties for the months that they will be away from them. Read the article here.
The article mentions turning off the main water valve and the hot water heater, and while I agree with this advice, when you return make sure to turn the water back on, before the hot water heater. The hot water heater has coils inside that can burn up if they are on with no water passing through them. I mentioned this in my new book Florida for Boomers: A Guide to Real Estate