The U.S. Department of Energy (DOE) issued an emergency order on June 11, 2026, authorizing Duke Energy to push its generating units to maximum output across the Carolinas — even if doing so means exceeding air quality and other environmental permit limits. The order, issued under Section 202(c) of the Federal Power Act, took effect at 4:00 PM ET and runs through 10:00 PM ET on June 12, as the region braced for unusually high temperatures and elevated electricity demand.
DOE Authorizes Duke Energy to Maximize Generation Output
The emergency order covers two Duke Energy subsidiaries: Duke Energy Carolinas, LLC and Duke Energy Progress, LLC. Together, they serve millions of customers across North and South Carolina.
The order authorizes specified generating units within Duke Energy’s service territory to run at maximum generation output — and that authorization holds even if operating at those levels would otherwise violate air quality restrictions or other permit limitations under federal, state, or local law. The 30-hour window, from 4:00 PM ET on June 11 to 10:00 PM ET on June 12, is tightly scoped to the anticipated peak demand period.
Duke Energy Flagged Insufficient Generation Capacity Ahead of Heat Surge
Duke Energy applied to the DOE for the emergency order directly, without waiting for regulators to act independently. The application described a specific and immediate problem.
Some of the utility’s generating units are restricted by conditions written into existing environmental permits – limits on how much power those units can produce under normal operating circumstances. With unusually high demand forecast for the region, Duke Energy determined that those permit-capped units represented a meaningful gap between available supply and anticipated load.
Without relief, the utility warned it may not have sufficient generation to meet demand. The consequence, stated plainly in the application, could be forced load curtailment — the industry term for deliberately reducing power to customers to prevent a broader, uncontrolled grid failure. In practical terms: blackouts.
Order Aims to Reduce Blackout Risk for Carolinas Customers
The DOE framed the order around a single core goal: mitigating the risk of unnecessary blackouts driven by high temperatures and elevated load forecasts. The word “unnecessary” carries weight, signaling that the agency viewed the potential outages as avoidable with the right intervention.
Secretary of Energy Chris Wright stated that maintaining affordable, reliable, and secure power in the Duke Energy service territory is “non-negotiable”. The order functioned as a temporary bridge, allowing Duke Energy to close the gap between what its permitted capacity would normally allow and what peak demand is expected to require. Once the order expires at 10:00 PM ET on June 12, normal permit restrictions resume. The relief is strictly limited to the emergency window and does not permanently alter any environmental permit.
Section 202(c) Orders: How the Emergency Authority Works
Section 202(c) of the Federal Power Act gives the DOE authority to direct electricity generators to operate during emergencies that threaten grid reliability — a provision that exists precisely for situations where normal regulatory constraints could prevent utilities from meeting critical demand.
Such orders are typically short-term, tied to specific emergency conditions and set to expire once those conditions pass. The authority has been used in prior heat events and supply emergencies to temporarily lift normal operating restrictions on generators, which is the same mechanism applied here.
The current order also fits within a broader policy posture. On his first day in office, President Trump declared a national energy emergency, citing what the administration described as growing grid vulnerability. Secretary Wright referenced that declaration in his statement, framing the Duke Energy order as consistent with the administration’s stated commitment to grid security.
Environmental Limits Could Prevent Demand Being Met
The DOE’s June 11 emergency order is a short-term, targeted intervention. It authorizes Duke Energy Carolinas and Duke Energy Progress to run specified units at maximum output through the evening of June 12, 2026, regardless of permit-level restrictions that would otherwise apply.
Duke Energy requested the order after determining that environmental permit limits on certain units could prevent it from meeting forecast demand — and that load curtailment, meaning blackouts, was a real possibility without relief.
No environmental permit is permanently changed by this order. It suspends applicable restrictions for a defined 30-hour window, after which standard operating and permitting rules return. The authority behind it — Section 202(c) of the Federal Power Act — is a long-standing emergency tool available to federal regulators when grid reliability is at risk.
