[MaxPengwing]

You actually can store energy. But it depends on if you have a house or an apartment, but you can get a Goal Zero or Jackery "off grid power station" which is basically a large power bank. That can keep your most essential tools like phones, or small camping coolers cold for days if you have medicin that needs to be kept at a stable temperature (certain proteinbased medicines or like just noraml insuline are temperature dependant).

for heating energy, you can just get like i did several camping stove gas cartriges or just go off and buy a Propane tank, which will last very very long.