 Matter of fact, those dew points, those measures of atmospheric moisture are coming on down. They were in the 60s and 70s, helping to fuel those outbreaks of showers and thunderstorms. They'll be settling back into the upper 40s and 50s. That means nighttime lows will be just about equivalent in the days to come over the northern plains and Great Lakes regions, northern sections of the Corn Belt. And the heat is finally breaking, too.