Hot Weather Alerts Issued for July 6 & 7


PJM has issued a Hot Weather Alert for July 6 for its entire footprint, and an additional Hot Weather Alert for July 7 for its Mid-Atlantic and southern regions.

Temperatures are anticipated to go above 90 degrees with high humidity, which drives up the demand for electricity. A Hot Weather Alert helps PJM and utility partners coordinate the flow of energy and avoid capacity problems on the grid.

A Hot Weather Alert helps to prepare transmission and generation personnel and facilities for extreme heat and/or humidity that may cause capacity problems on the grid. PJM works with transmission and generation operators to determine if they can defer or cancel any maintenance or testing on their facilities.

The mid-Atlantic region includes the Atlantic City Electric, Baltimore Gas and Electric, Delmarva Power & Light, Jersey Central Power & Light, Met-Ed, Penelec, PECO Energy, Pepco, PPL Electric Utilities, PSE&G, and Orange & Rockland (Rockland Electric Company) transmission zones.

The PJM southern region consists of Dominion Virginia Power’s service territory.

Preparing for Summer Demand

PJM power system operators have forecasted a peak demand for electricity this summer at approximately 149,000 MW but have performed reliability studies at even higher loads – in excess of 155,000 MW – for the region that includes 13 states and the District of Columbia. PJM has over 185,000 MW of installed generating capacity available to meet customer needs, with sufficient resources available in reserve to cover generation that is unexpectedly unavailable, or for other unanticipated changes in demand.

PJM’s all-time highest power use was 165,563 MW in the summer of 2006. One megawatt can power about 800 homes.

Track Operations in Real Time

Track PJM’s markets and operations in real time on the Markets and Operations page on or through the PJM Now app for iPhone and Android.

Learn more about how PJM prepares for summer operations on the Learning Center.