‘Stretched to the limit’: Heat wave prompts US electrical grid emergency

The U.S. Department of Energy has declared an emergency as a heat wave bears down on a huge part of the nation’s electrical grid.

​The U.S. Department of Energy has declared an emergency as a heat wave bears down on a huge part of the nation’s electrical grid.  US The U.S. Department of Energy has declared an emergency as a heat wave bears down on a huge part of the nation’s electrical grid.