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.

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.

“Set your AC to 78 degrees, turn off lights/electronics you’re not using, and unplug what you can,” the socialist mayor said.

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.

A dangerous heat wave is bringing prolonged extreme heat to more than two dozen states across the Midwest, the South and the East Coast.

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…

As a punishing heatwave bakes major East Coast cities, US Energy Secretary Chris Wright directed data centers in the mid-Atlantic this week to use their backup power supplies…

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.

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.