There are a great many types of water heaters currently on the market. From the traditional electric water heaters with a tank setup in your basement, to the new tankless systems that work regardless of your power status, your plumber will know what to do.
Whether you need help with Installation, parts, repair, or service, there's nothing you can't get help with in the area of water heaters. You can't get that kind of service from every plumber, but you shouldn't settle for anything less when taking care of your home.
Remember that emergency service is available 24/7. Service contracts and preventative maintenance are available.