S3E23 - America’s 250th Nearly Melted Down: The Historic Heat Wave That Changed the Fourth of July

America’s 250th birthday celebration was supposed to be one of the biggest events in the nation’s history. Instead, record-breaking heat, dangerous thunderstorms, emergency evacuations, and severe weather forced officials to cancel parades, alter major events, and protect hundreds of thousands of people from life-threatening conditions.

Discover how a powerful heat dome sent temperatures soaring above 100°F across the Mid-Atlantic, why the heat index climbed well above 110°F, and how the atmosphere produced severe thunderstorms capable of disrupting celebrations on the National Mall just hours later.

We also explore why extreme heat remains America’s deadli...