When I worked in an auto plant, one of the jobs that was forced upon me as bottom head on the engineering totem pole was 'heat stress relief'.  They loaned me out to the Health and Safety department and I would walk around the plant with a high-tech thermometer and record the wet-bulb temperature.  If we got over a certain value (according to a handy chart they supplied me with) I would order extra long breaks and the distribution of popsicles for the line workers.

So basically what I'm saying is that popsicles might fit the bill here.  You know what I'm talking about.