Install "Redneck AC" for the room during the hottest part of the day: small fan + several plastic bottles of water that have been frozen. Point the fan at the water bottles and blow the cool air across the room. We did this a few years ago during a summer power outage where our daytime highs topped 100*F. We had a generator but it wasn't power the HVAC, just the refrigerator/freezers, a few fans, the cell phone chargers, and some lights.