Fourth of July weather forecast: Heat, storms and smoke ahead; plus, two humpback whales traveled more than 9,000 miles

Millions of Americans will face a mix of heat, thunderstorms and wildfire smoke over Independence Day weekend, with weather threatening travel delays and outdoor celebrations across parts of the U.S. Also, decades of whale photos helped researchers identify two humpbacks that moved between breeding grounds on opposite sides of the Southern Hemisphere, a rare crossing documented between Australia and Brazil. Learn more about your ad choices. Visit podcastchoices.com/adchoices