Anecdotal, but I've lived in DFW for over a decade. The only time I lost power for more than a minute was due to a drunk driver hitting a utility pole just outside my house. They had the pole fixed and everything working again within an hour.
Having lived in both DFW and Houston, I will definitely say Houston's infrastructure is much more fragile, but the weather is also much more extreme.
Having lived in both DFW and Houston, I will definitely say Houston's infrastructure is much more fragile, but the weather is also much more extreme.