If there's no gas, most homes can heat with electricity. Turn on your oven, your gaming console, your TV, open your fridge's door, etc. Also as I understand it,

If there's no gas, most homes can heat with electricity. Turn on your oven, your gaming console, your TV, open your fridge's door, etc. Also as I understand it, it's much easier to do rolling blackouts on electricity than on gas, so gas will be more likely to fail for a long time than electricity. Most industrial processes can be stopped without endangering people.