Summer scorcher: 40 million under heat alerts from California to Minnesota

[Music] Tonight, extreme heat scorching parts of the Southwest. More than 50 million people under heat alerts from California to Minnesota. In Arizona, Phoenix breaking a daily heat record.The region expected to reach a scorching 117°. The city of Phoenix has different ways they're trying to help people beat this extreme heat. They're giving out waters and also closing trails like this one for most of the day, telling people, "If you want to get outside, do so early." This couple began their hike at 4:30 th ...