Eh, Larry, it's just one more instance of record temperatures where and when they aren't supposed to be, too often for comfort, but the simple answer is, 'Something's bent.' According to Chicago, this big pattern should be pushing out shortly. For that city and several parts surrounding, they're expecting a drop of twenty degrees overnight. May not be tidy.
But there's some kind of massive atmospheric gyre circling all the way from where you are to about where I am. It will apparently be shoved past you forthwith. Don't put out the pilot light.