According to this, the regions most at risk are CA, TX and teh Carolinas
https://www.eenews.net/articles/grid-monitor-warns-of-blackout-risks-across-u-s/
Carolinas is understandable, because of hurricanes, and California is understandable, because it is a state bent of making life hell so it can be sold off to the Chinese for pennies on the dollar.
But Texas has no excuse.