A deep freeze is gripping the US in the wake of the worst storm so far this season, leaving the country’s biggest electric grid in emergency status and bracing for record wintertime demand.
PJM Interconnection LLC, which serves 67 million people from New Jersey to Chicago, issued a grid emergency for Tuesday and warned demand may exceed record levels for winter. With another burst of frigid air expected Friday, electricity demand could continue to test the system through the end of the month.
Freezing temperatures now cover vast swaths of the US, after a weekend storm canceled flights, blanketed ...
