I looked at some climate charts of Texas. While this winter though really is exceptional, it's quite possible in a normal winter that the temperature goes at least down a few days to regions where water starts freezing.
So having an infrastructure unprepared for this, even in Texas, is careless.
Okay, so... its not about climate change. I live in northern Florida, we get a winter every year - not a lot of days, but there is always a freeze, we've had several this year.
IIRC, oranges need a freeze to come out right - they grow those south of here.
Texas - well, Austin is right about in line with us. The North end of Texas is in line with the NC/Virginia border.
I'm sorry, but they have to get weather. What it is, half the state is south of here, though not as far south as Miami.... But look at weather patterns, the snow might not be normal, but the cold.... yeah, don't buy it, not for the whole state. [They also get weather extremes the other way, there is a reason I will not live there - I hate hot.]