Excessive heat continues today as much of the Northeast and parts of the Mid-Atlantic are under Heat Advisories from the National Weather Service, with high temperatures expected to be in the mid- to upper-90s.
PJM Interconnection, the operator of the nation’s largest electric grid, issued Hot Weather Alerts Monday through Wednesday for its Mid-Atlantic and Dominion regions, and today extended the alert for Thursday in the Dominion region, which includes Virginia and parts of North Carolina served by Dominion Energy.
The alerts help PJM and utility partners coordinate the flow of energy and avoid capacity problems on the grid.
Based on preliminary estimates, electrical usage reached its highest point this year at 5 p.m. Eastern on Tuesday (Aug. 28), peaking at more than 151,000 megawatts across 13 states and the District of Columbia.
PJM’s all-time highest electricity usage was 165,492 MW in summer 2006. Last summer, demand peaked at 145,331 MW.