 organizers into the race early due to extreme heat. The high temps baking parts of the U.S. are not stopping many families from celebrating outdoors. They're taking to the beaches and the pools to cool off from the hot weather. Roughly 150 million people in 21 states are under heat alerts, including here in California, where temperatures are set to exceed 110 degrees throughout much of the state this week. In New York City, security ramped up ahead of this evening's firework display.