You are abolutely right, thanks for pointing it out.

As you've said, it hasn't happened yet.

Of course it can be prevented by hydrogen fueled heating, using hydrgogen from places with excess solar power, perhaps currently dedicated to maximising Bitcoin production.

How we could affect that, is to publicise this predicament, and if enough people see it, the Bitcoin price will be impacted, and therefore its production, will momentarily hiccup, if enough people see how this is working, but the solar energy received in those places won't stop, and if they have hydrogen production in process, balanced with the load of their Bitcoin production facilities, they will quickly see an excess of hydrogen, which, if they publicly donate to those needing it, will recover the price of Bitcoin