Where Is My Water Heater?

Have you ever sat and wondered to yourself where is my water heater? It is always summer time and suddenly I get this sinking feeling in the pit of my stomach. My hot water heater seems to be working harder than normal. The bills keep coming in but I have no idea why. I am about to call a plumber to come take a look but before I do I go through some simple troubleshooting steps to find out what is wrong with my hot water heater.