Power supplies are tightening on grids that serve roughly one-third of the US population, as a short-lived blast of heat in the Midwest and Mid-Atlantic collides with planned off-season maintenance outages.

Emera Inc. agreed to acquire Canadian Utilities Ltd. for about C$14 billion ($10 billion) in stock, creating a sprawling, Canadian-headquartered power and natural gas provider with customers from Florida to Alberta.

California and the US West are facing a burst of summer-like heat in early October, boosting electricity demand and raising the risk of wildfires.

Fire crews have contained a blaze Friday at Vistra Corp.’s damaged battery storage facility in California.

Shares of Fervo Energy Co. surged Tuesday after the geothermal developer signed a deal to sell almost 400 megawatts of power to Alphabet Inc.’s Google for a prospective data center in Utah.

The largest Texas grid is bracing for another bout of searing heat that threatens to topple its all-time power demand record yet again, just as wind generation is predicted to take a dive.

The tropical Pacific climate pattern is no longer just a weather event — it has become a significant macroeconomic variable.

A searing heat dome over the eastern US that’s disrupting some Independence Day festivities in Washington, DC, and drove power demand to record levels is threatening to bring potentially dangerous thunderstorms across the region this weekend.

A dangerous heat wave that is trapped over New York City is also trapping people in the city.

Power prices from New York to Virginia are surging as sweltering heat threatens to overwhelm US grids and upend travel for the Independence Day holiday.

A dangerous heat wave is expected to engulf the eastern US in the coming days, threatening power grids just as a critical slate of World Cup football matches is scheduled heading into the Fourth of July weekend.

Severe temperatures are having increasing impacts on workers and businesses

Dangerous heat and humidity will stress power grids along the US East Coast Friday, putting pressure on prices as the risk of severe thunderstorms spreads from the Midwest.

Scientists warn a blockbuster weather event risks pushing costs higher for everything from building materials to groceries.

Scientists warn a blockbuster weather event risks pushing costs higher for everything from building materials to groceries.

US scientists say the El Niño weather phenomenon that has emerged in the equatorial Pacific is on track to become one of the strongest on record, raising the odds of destructive droughts and floods in the months ahead.

El Niño may limit the number of hurricanes this season, but one landfall can still hit insurers, energy, orange juice and power grids.

As Americans confront a surge in prices at the pump, another inflation wave is headed for the grocery store.

As Americans confront a surge in prices at the pump, another inflation wave is headed for the grocery store.

The utility giant is expanding into some of the US’ costliest weather zones.