C

One thing i find a lot of people overlook is caravaning. You can run out to a neighbouring settlement to buy wood, and stock up for a heatwave.

Also in desperation you can also leave the tile temporarily until the temperature settles down.

What I like more is that it looks like only half the win10 users are switching to win11

Edit: -1% win10, +0.5% win11

Electrolysis, it works but it takes a lot of energy to produce, so burning hydrogen from this would be a fools errand.