The U.S. Department of Energy has declared an emergency as a heat wave bears down on a huge part of the nation's electrical grid.

Grid operators warn the US heatwave could send electricity demand near record levels before Fourth of July weekend.

The DOE authorized Duke Energy to exceed pollution limits as 100°F heat strained the Carolinas grid, part of Trump's broader national energy emergency.

"PJM has implemented several alerts and actions to maintain reliable system operations..."

Trump declares power emergency as heat wave looms, but blue-collar workers bear worst effects, says Robert Reich.

La orden del Departamento de Energía activa mecanismos especiales para forzar el despacho de plantas y asegurar el suministro de 67 millones de personas ante picos de demanda…

Residents have been urged to slash their energy use as the heat wave bakes the eastern U.S.

Tens of thousands of customers are already without electricity, and more storms are threatening to knock out power in parts of the Midwest.

The U.S. Department of Energy has declared an emergency as a heat wave bears down on a huge part of the nation's electrical grid.