Tens of millions of Americans continue to suffer through extreme heat. If we're already seeing higher-than-normal temperatures in June, what can we expect for July and August? Plus, we'll examine the tremendous toll the heat is taking on the country's power grids. Then, unprecedented flooding has closed parts of Yellowstone National Park indefinitely. We'll speak to one woman who has been on the ground there for emergency response. And relief is on the way for parents with little ones at home. Kids under five can start getting vaccinated, perhaps as early as next week. We'll tell you what you need to know. And Watergate happened 50 years ago. We'll examine how its legacy still affects our attitudes toward politics today.