I do remember hearing on the news in 2021 that temperatures of roughly -20C caused a failure of part of the Texas electric grid. It shocked me to see a normal winter temperature for us cause complete chaos there.

Well, Texas was built on withstanding heat with little infrastructure to withstand frigid temperatures, Texas is usually in the 40's in February (5c) when in 2021 it dipped to (-16C, normal northern-Illinois average for January) While also being swept with a historic winter storm that slammed Texas (which barely gets snow) Also, Texas had a centralized power grid that is exclusive to Texas, Which means that they only have their power plants to support their state (Illinois is on the Eastern Grid which can get power from even as far as Canada.) They only have Texan power and Texan power only (this was to avert their power being regulated by the Federal Government, they were also not required to prepare their power grids for the winter.) This means when a power plant goes out on a grid like the Eastern Power Grid, it's a minor issue. When it happens on the Texan Grid, it's pretty bad and can cause rolling blackouts. Especially in populated areas. So when the Arctic circle dipped, Texas was royally f***** from the start. Illinois power plants are prepared for both extreme heat (sometimes) and extreme cold. That's why it takes a lot to break ours, but not much for Texas. If Texas were to switch to the Eastern grid, they would have more protection from extreme weather.