A massive heat wave across eastern US pushed electricity demand close to record levels on Friday, prompting the country's largest power grid operator to activate emergency measures to reduce consumption.

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.

Cities open cooling centres, extended pool hours and urged residents to conserve electricity

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.

PJM says Thursday’s demand could break its 2006 summer hourly integrated record peak of 165,563 MW. The grid operator has recieved approval to curtail data centers and other large…

A dangerous heat wave is tightening its grip on the East Coast, with the worst conditions arriving as millions prepare to celebrate the Fourth of July outdoors.

A dangerous heat wave is tightening its grip on the East Coast, with the worst conditions underway as millions prepare to celebrate the Fourth of July outdoors.

Millions of Americans sweltered in stifling heat and humidity Thursday with dangerous temperatures expected to hit swaths of densely populated areas through the Fourth of July…

National Weather Service warns heat index could reach 115F as extreme heat grips midwest, Ohio Valley and east coast

As the United States heads into a milestone July 4 holiday this weekend, parts of the Northeast are preparing for hazardous levels of heat.

La medida federal autoriza acciones extraordinarias para garantizar el suministro a hospitales, infraestructuras críticas y millones de hogares durante el feriado del 4 de julio

NEW YORK: Pools were packed and power grids strained as millions of Americans sweltered in stifling heat and humidity Thursday, with dangerous temperatures expected to hit major…

The heat wave threatens to overwhelm U.S. grids and may force some to change their plans on one of the busiest travel weeks of the year.

PJM issued a maximum generation alert for July 3 as a punishing heat wave pushes electricity demand near record highs across its 13-state footprint.

More than 250 million Americans are experiencing a dangerous heat wave that has already spoiled some Fourth of July plans.

PJM's power grid neared a 20-year demand record this week as a heat wave and surging data center growth strained the system.

During extreme heat waves, power grids are more vulnerable to outages. Experts and utilities said there are many ways people can reduce the energy strain.

Cities and towns across the U.S. are facing the tough decision of canceling or postponing festivities as a triple-digit heatwave continues.

A punishing heat wave threatened America's July 4th celebrations, World Cup matches and power grids as near-record temperatures scorched the eastern United States on Friday.