PJM has issued a Hot Weather Alert for June 5–6 for its Mid-Atlantic and Southern regions ahead of expected 90-degree weather.
A Hot Weather Alert is a routine procedure PJM issues ahead of forecasted hot weather and/or high humidity to prepare transmission and generation personnel and facilities for expected increases in electricity demand, or load.
This procedure does not require any action from customers.
Temperatures are expected to reach and exceed 90 degrees, driving increased electricity demand.
Forecasted Peaks
As of 1 p.m. on June 3, PJM is expecting to serve the following approximate peak loads on June 5 and 6:
| Date | Forecasted Peak Load |
| June 5 | 130,617 MW |
| June 6 | 127,560 MW |
These numbers are official as of 1 p.m. on June 3, 2026. They are subject to change and will be updated periodically.
Impacted Regions
PJM’s Southern Region is made up of the Dominion transmission zone. The Mid-Atlantic Region is made up of: 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).
A dedicated team of operators uses sophisticated technology to balance supply and demand and direct the power grid 24/7 from PJM’s control rooms. They prepare multiple potential scenarios that could be impacted by weather, emergency conditions or equipment failure. They adjust resource output with changes in demand and ensure that no transmission lines or facilities are overloaded. The team also watches for unusual conditions and reacts to them to protect the electricity supply.