For those wondering what the causes are of Texas blackouts, @JesseJenkins is doing a really good real time analysis of generator capacity and operation. (Short story: we have a natural gas problem in TX). A few additional thoughts to add:

1/ As Jesse notes, natural gas is somewhat unique in that it is both a power plant fuel and a home heating fuel. When cold weather comes, regulators bias in favor of heating rather than power generation.

2/ New England - a region that is both cold and has long been more reliant than others on natural gas for power generation - has had to grapple with this for a long time.

3/ In most of the country, the tightest times for power markets are during hot summer days when demand peaks to run all that AC. In New England, the tightest times are often cold winter days when supply gets constrained as the gas is redirected to heat

4/ Texas isn't used to planning for cold snaps, but they are gas-dependent on the power grid. So they are, in essence, acting like New England right now.