PJM warns of record demand as heat wave strains largest US grid

PJM Interconnection warned of price spikes and transmission congestion as the largest US power grid braces for record demand from a heat wave.

The U.S. Department of Energy on Tuesday declared an emergency across PJM's footprint, citing soaring demand and tight supply conditions, according to an agency order. PJM issued a Maximum Generation Alert and Load Management Alert for July 1 across its 13-state region.

The grid operator detailed price spikes and warnings of massive transmission line congestion as it prepared for record-breaking demand driven by a heat wave before the July 4 holiday. PJM coordinates the movement of wholesale electricity in all or parts of Delaware, Illinois, Indiana, Kentucky, Maryland, Michigan, New Jersey, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia and the District of Columbia.

The emergency order authorizes PJM to curtail data center operations and waive certain power plant pollution limits to maintain grid reliability, according to the DOE filing. The measures reflect growing strain on the grid from the combination of extreme weather and surging electricity demand from data centers.

The warnings come as a powerful heat wave threatens much of the eastern United States this week, pushing cooling demand to projected record levels. PJM's alerts do not require immediate load reductions but signal that reserves are tight and all available generation is needed.

The grid strain raises the risk of higher electricity costs for consumers and businesses across PJM's footprint. Investors will watch for further updates on capacity margins and any emergency measures as the heat wave peaks through the July 4 holiday weekend.

This article is for informational purposes only and does not constitute investment advice.