The temperature on the ramp is 120 to 125. The plane is also very hot inside due to maintenance issues that have been fixed for a while now. The air conditioning systems can't cool the plane down to a safe level, and we can't board the plane until they do. The gate supervisor just got on the PA and said that we just have to wait until they "figure something out." C'mon folks, this is Texas. It gets hot like this every summer--why are you so unprepared?