Damaged by Polar meltdown
As the sea levels continue to rise, water tables will begin to become contaminated with salt water and any number of additional pollutants increased by the flooding of structures, factories, sewage treatment plants and innumerable other chemical and biological agents. As the coastal residents become flooded and their water sources contaminated, millions of refugees will move inland which will place a massive strain on inland water supplies. This will be additionally compounded by the ever increasing population levels.
As the weather patterns change, certain areas will begin desertification and drought. The melting poles will affect sea current temperatures such as the loss of the cold Arctic current on the West coast of the US. Already, California declared a drought emergency Feb 2009. After the melting has become a total thaw of both poles, the moisture levels in the air humidity and precipitation will significantly drop.
According to a US government report aired on national news in 2007, they are expecting a critical Nationwide water shortage by 2020. The interesting thing about this date is that it coincides with the scientific reports claiming both poles will be melted by 2020. So despite any claims to the contrary, both the government and the scientists seem to be focusing on the same timeline.
In 2008, the city of Atlanta was facing a severe water shortage. Also in 2008, the state of Florida was experiencing drought conditions in the everglades and wetlands. We are now seeing the beginning of a terrible global water shortage.
The best thing we can do is to live inland above 300 ft elevation and to seek alternative water sources such as drilling wells or building cisterns. Anything which might help increase your access to water. Another suggestion would be to set up water filtration systems and use green measures to reduce your water dependency... such as drought resistant trees and plants. It would also be beneficial to use solar energy to heat your water. Setting up large water storage tanks would also be helpful but you have to remember to ensure against bacterial and algae contamination to keep the water potable.
The UK has a guide on things you can do to survive the water shortages and permanent weather changes.