PJM has issued a Hot Weather Alert for the entire region PJM serves Aug. 31 through Sept. 2 ahead of expected hot and humid 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 staff and facilities for expected increases in electricity demand, or load.
This procedure does not require any action from customers.
Temperatures are expected to exceed 90 degrees with high humidity in many areas of the RTO, driving increased electricity demand throughout the PJM footprint.
Forecasted Peaks
As of 8 a.m. on Aug. 28, 2026, PJM is expecting to serve the following approximate peak loads from Aug. 31 through Sept. 2:
| Date | Forecasted Peak Load |
| Aug. 31 | 148,706 MW |
| Sept. 1 | 153,599 MW |
| Sept. 2 | 155,821 MW |
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.
Read more about PJM’s emergency procedures and messages (PDF).