A persistent heat dome is set to envelop the eastern United States over the July 4 long weekend, threatening to break electricity demand records. Utilities may feel the pressure as air conditioners run non-stop and local fans gather for a busy World Cup weekend.

An intense heat dome is poised to envelop the United States this week, ushering in soaring temperatures and heavy humidity for millions. Americans are urged to “buckle up” as this weather phenomenon threatens to roast the nation, marking a dramatic start to summer.