This isn't "Texas-related," but just a wee bit north of there. Here in central Oklahoma, we had one day where our temps dropped down to -7 one morning. At 4:55 am, we still had water...at 7:00 am, all was froze up. And, silly me, I apparently didn't have water in our fresh water tank.
Anyway, the next morning, it got down to -16 degrees. After considering everything, I decided that our water supply hoses froze up outside. In the past, when things got down close to 0 degrees, one hot water line to the kitchen sink in our fifth wheel would be the only thing that froze up. Our supply hoses are wrapped with heat tape and are inside two different sizes of foam insulation tubes, but it was just too cold even for that protection. A day or two later, it got up near 20 degrees and the heat tapes thawed out the supply hoses.
Later, after helping our son get a "new to him" house ready to move into, I was putting away tools in their proper places. Two sets go on the rear floor of our Ford F450, but I didn't want to get a bunch of snow on my shoes. So, I got out a small shovel the wife wanted to buy one time.
Just goes to show, that living full time in an RV doesn't give one much room for a decent sized shovel for snow accumulations.
Terry