An extreme heatwave is disrupting the US 250th Independence Day events, forcing cancellations, hospital treatments and grid warnings for more than 185 million people.Washington recorded near-record 112 F temperatures and heat indexes above 110 F; the Independence Day parade was canceled, the Great American State Fair temporarily closed, and at least eleven people were hospitalized while President Donald Trump still plans a late-night speech and a fireworks program of about 850,000 shells.Grid operator
PJM urged consumers to conserve electricity as New York City reported about 17,000 households losing power briefly, officials in Boston and Philadelphia canceled events, and forecasters warned of severe thunderstorms and tornado risk this weekend.