Last week my crew laid 16 tons of hot mix asphalt base down by hand (was one of the jobs where a machine couldn't access) then we topped it with 11 tons of top. All in the heat in the wide open. Temp was 98 degrees and humidity was in the mid 90's. I don't think I ever sweat that much in my life. Was even worse, I had to run the roller on it soon afterward. Now we are shoulder cutting I-80 and the heat gets bad. I have been lucky though,as I have A/C in my tandem dump truck..