Sounds to me like you are actually calling for a dome. If we had a retractable roof are you suggesting that we close the roof for a game if it is too hot, even though it is not raining? If that is the case, I totally disagree. I assume you would have closed it all this week even though the game times were at 7:05, and it did not rain. I have been to sticky night games and hot, steamy day games - do I wish it was 75 degrees and breezy all the time? Of course I do, but that is no reason to build a dome.
Being a native Washingtonian I know that the heat and humidity can be brutal, but this year has been worse than most. Plus, the new stadium will certainly be more open than RFK thus allowing for air circulation and breezes, etc..,
Just say NO to domes!!!!