They hadn't planned on all the windmills in Texas freezing up. Some may pause for thought about the reliability of "green energy", after this.
And you know what cold weather does to batteries. The range on many EVs will be greatly reduced. So, turn off the heater unless you want to be stuck on the side of the road, waiting for a battery charge.
But they HAD plsnned on periods of no wind, and no solar, which is why the windmills were backed up generously (one FReeper TX power-industry-guy says 115%) by fossil plants. Unfortunately, a lot of the fossil plants (mostly gas, and not just the backups) froze up too, and that loss of output was much greater in total GW than the loss of wind power. Plus, "direct" gas feeds for heat and power also froze up.
The biggest problem with wind power is that it is heavily subsidized and distorts the market, plus it requires backup sitting around a lot ($$$). IMO we should kill the subsidies and require the wind power suppliers to provide that 115% backup from other sources*, ALL required to be winterized.
*One way to do it, if greatly expanded:
https://en.wikipedia.org/wiki/Taum_Sauk_Hydroelectric_Power_Station
(Upper / lower reservoir system that acts as a giant "battery".)