400 people treated for heat-related illness at Arizona airshow as record temperatures bake the West

Record-shattering temperatures are expected to continue on Sunday as a rare and strong early-season heat dome has resulted in triple-digit highs in some parts of the Western U.S.

As the temperatures soared to 105 degrees on Saturday in Phoenix, Ariz., the third-straight day the weather has topped the 100-degree mark, more than 400 people attending an airshow in nearby Glendale were treated for heat-related illnesses, authorities said...