In the dark, literally and figuratively

I'm sitting here looking at the icy, snowy covered deck. I had to open the blinds because the power is out. The room is starting to get chilly. I'm glad we bought some wood last night but I have to admit I'm a little concerned. How long do we have to be in the dark and cold before real concern takes over? I remember the ice storm some years back, my power was out almost three days. I wish we had more wood and definitely more candles.