Keep it only in approved containers. Do not fuel the generator until it has cooled completely. The generator must be properly connected to its load with an approved transfer switch. A knowledgeable licensed electrician should do this. Improperly connecting a generator may burn out your electrical equipment or put dangerous voltages into the electrical system that could kill a lineman working miles away.
Heat Have an alternate heat source.
This should be planned in advance and designed to heat your area safely. Again, you must consider carbon monoxide. This odorless, colorless gas can kill in a short time in high concentrations. Do not use unvented heaters without a proper air supply. Do not use charcoal or propane grills to heat your home.