Parts of the United States are bracing for unusually hot days as a significant heat wave impacts various regions. Nearly 30 million Americans are currently under heat advisories or extreme heat warnings due to the intense temperatures. The western states are experiencing some of the most severe conditions, with Death Valley expected to reach a scorching 121 degrees by August 12. Cities like Las Vegas and Phoenix are under extreme heat warnings, anticipating highs near 110 and 111 degrees, respectively.