A long-running heatwave that has already broken records, sparked dozens of wildfires and left about 130 million people under a high-temperature threat is about to intensify enough that the National Weather Service has deemed it “potentially historic”.
The NWS on Saturday reported some type of extreme heat or advisory for nearly 133 million people across the nation – mostly in western states where the triple-digit heat, with temperatures 15F to 30F higher than average, is expected to last into next week.
