U.S. Power Grids Wobble In Extreme Heat

The first extreme heat wave of summer is stressing the nation’s power grid and prompting the Trump administration to let some power plants in the Southeast exceed emissions limits to help keep air conditioners humming. Via Politico:

The order is the latest in a string of emergency actions by President Donald Trump’s Energy Department aimed at allowing fossil fuel plants to operate when they wouldn’t otherwise be idled or shut down. The actions come as power plant retirements, delays in...