Emergency ordered for largest U.S. power grid as record heat nears

The Trump administration has declared a power emergency for the nation’s largest energy grid in advance of a dangerous heat wave that threatens to strain electricity infrastructure.

The emergency order issued by the Energy Department Tuesday authorizes power plants in the PJM Interconnection LLC region, which serves 67 million people across 13 states, to operate at maximum levels and exceed some environmental requirements.

A second Energy Department order authorizes the use of backup generators in the PJM region “as a last resort,” PJM said. Both orders run until 11:59 p.m. New York time July 3.

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