This is a test of commonsense. Complete the next sentence:

How to turn up a hot water heater
Put out any other open flames before adjusting the gas water heater.
Natural gas is flammable and, while you should not come in direct contact with the gas, safe is better than sorry. Avoid using candles, cigarettes, or other open flames in the home while you're adjusting the water heater.
You do not need to turn off the gas while adjusting the water temperature. Locate the dial on the front of the water heater.