NOAA – High temperatures and extreme humidity will extend into week of July 25, 2016: “A widespread heatwave is parked over the central United States, causing heat index values to reach 110 degrees F, with some areas reaching 115 degrees by Sunday as the high pressure ridge spreads to the East. As of Friday, July 22, almost 124 million people are under an Excessive Heat Warning, Excessive Heat Watch or Heat Advisory. The high pressure and extreme humidity will begin to ease up on Tuesday, July 26, but some portions of the Southeast will continue experiencing heat index values as high as 110 degrees into Thursday. A unique feature of this heatwave is its very high overnight lows, which will offer little relief from the oppressive heat – especially in the Northern Plains and Upper Midwest…”