The regional power grid operator that covers West Virginia, Ohio and parts of Kentucky has extended its heat warning through Monday with Saturday shaping up to be the hottest day of the year. Appalachian Power continues to postpone routine maintenance activities that require planned shutdowns during the heatwave to keep customers’ air conditioners on during a weekend expected to bring the hottest day of the year. APCO posted the following statement on X, Formerly Twitter, “With this week’s high temperatures, we’ve canceled some operational activities to ensure the safety of our customers and employees. See more details and view energy-saving tips at http://ms.spr.ly/6018Y0rXK.” PJM, the power grid boss for West Virginia, Ohio and parts of Kentucky has extended its hot weather alert through Monday.