The more I look into Texas the more it seems it was an inside attack.
DS insiders giving them a big FU for not being tied into the federal grid.

We have things that bite you, sting you, kick you, throw you, stick you, stomp on you, burn you, flood you, blow you away and now freeze you here. Hardships are ridden out and those that survive get tougher. If this turns out to be a "man-made" weather event, your "angry meter" is going to peg out and break.