[RedDevil]

In the Nordic countries they have lots of windmills and lots of cold, and they never freeze solid. Maybe those Texas windmills are missing something essential, like frostproof bearings or internal heaters?

If the blades get covered with a layer of ice I understand why the mills got shut down. That's a rare and extreme condition though.

Over here we just ended one week of snow, the first in quite a while, down to minus 11 Celsius on our wall-mounted outside thermometer. Most of the solar panel arrays were completely covered, but some arrays were completely free of snow on an otherwise snow-covered roof. IIRC Tesla solar panels have a thaw program to melt off snow when needed, and apparently they are not alone.
The wind turbines were happily spinning in the mild cold breeze.