Possible in my view, though the headline is unduly alarming as it implies that the power could be off continually for days. Some days of rota power cuts are in my view possible. And perhaps for more than a few days.
And yes I do have bottled gas and candles.
Candles, several thousand.
Bottled gas, 3 cylinders each 19 kilos of propane and a fourth one about half full. A dozen disposable gas cartridges also.
Tilley lamps, Alladin oil lamps, Duplex oil lamps, hurricane lamps. a hundred litres of paraffin.
