Yeah it's definitely not preferable to the players at night time. You can't breathe in there because of the already contained heat and then the additional body heat. The only time it helps is when the sun is blazing down. Even then they wait until it's usually 40+ on the Wet Globe Bulb index. I'd be very surprised if they closed it tonight. Maybe if one of the players raised a big enough stink but I can't see the Chair Ump doing it personally.