I didn’t know that- does that mean the power outages wouldn’t have happened ( or not so badly) if they were tied into other grids? My understanding is that their power plants aren’t adequately weather-proofed for cold weather, whereas plants in other areas, such as New England, are. Power plants in Texas would normally be concerned with overheating, rather than freezing!
It's been a combination of factors.
Power plants and pipelines with no safety margin built in, so they stopped working because of the cold weather.
Texas choosing not to be part of electricity sharing with other states (to avoid federal regulations) meaning that no one could send them power.
Houses being inadequately insulated, meaning that the need for power was highest right when the power went out.
They were not prepared for the kind of extreme weather we're starting to get as a result of climate change.
I'm sure nothing will change as a result...