It's been unseasonably cold in San Diego. Great time to make sure your heater works. I turn my heat off at night. I woke up and went downstairs, shivering. It must have been 50 degrees. Turns out, I left the fireplace open with the flue open all night. It was ridiculously cold in the house. I immediately ran over to the aquarium, sure that all the denizens would be frozen into little cubes. I checked the thermometer: 78. Phew!!!
Don't forget to make sure your heater is working!