Not really,,,When the pattern gets stagnet like this I lose interest. Don't even go to the weather service site. One thing of curiosity. Heat waves usually end, a week from when they started. Since you suggest some kind of change next week end,,proves the point. As far as rain chances..Prolonged warm,stanet, Heat Domes, usually end with little rain. Also,,as past two systems have shifted the energy north and west,,I would suspect any future chances would line up within the same areas. Next weekend will be 15 days since any rain in my area. Where I moved from was much dryer though. Was common to go 30 days with less than a quarter inch during summers.