Except for the northernmost panhandle, Texas cities and towns weren't set up for this kind of cold. Water lines aren't buried deep enough. Natural gas and LP flow slow in the cold and those tanks and meters are above ground. Wind turbines freeze and then ice builds up on the blades, causing massive damage... and those blades are basically replace only, no repair. Ice pulls down powerlines.

Cell towers need electricity too. They have backup generators, but a lot of folks are finding they can't get the gennies to turn over because the fuel is too cold.... because the gennies are in uninsulated buildings or just out in the open. Ever tried to start an older diesel truck when it's 0 out? There's a reason those older pickups had a little power plug hanging down, was to warm things up before you tried to start it in the cold.

Tornados and hurricanes and 115F for weeks we can handle, but sub zero temps with ice storms throw us for a loop same as 115F kills off people in Canada.