Forecasters issue urgent alert as a mega heat dome threatens 35 U.S. states

A massive high‑pressure system is forming over the United States. Forecasters have labeled it a “mega heat dome” that could cover 35 states. The system is expected to trap hot air and suppress cooling breezes. Officials issued an urgent alert to warn residents of extreme heat. The heat could raise temperatures well above seasonal norms. Public health agencies are preparing for increased heat‑related illness. Power utilities are bracing for higher demand on electricity grids. Residents are advised to stay hydrated and limit outdoor activity.