Texas's power disaster is a warning sign for the US

 

In February, extreme cold and an unusual winter storm left millions of Texans in the dark. Many went without power or water, in subzero temperatures, for nearly five days. It was a disaster; dozens died. But even though that storm hit much of the country, the power outages were mostly limited to Texas. That’s because Texas is on its own electrical grid, separate from the rest of the country, which means it can’t easily get power from other states in an emergency.