Heat stress is a serious concern. Heat-related illness is often mistakenly characterized by death only, however heat-related illness very much resembles an exposure-response curve, where severity worsens as exposure increases and persists. As a typical exposure-response relationship suggests, conditions become more debilitating with prolonged heat exposure. Ultimately, heat-related illness encompasses a variety of symptoms and conditions. The first, most mild stage is heat cramps, and as heat stress persists severity increases to heat syncope, heat cramps, heat exhaustion, then heat stroke. Unfortunately, sufficient data is not available on the intermediate phases with respect to farmworkers. This is because the Bureau of Labor Statistics’ Survey on Occupational Injuries and Illnesses collects OSHA reportable cases only when they result in one or more days lost in work, and agricultural workers have some of the lowest report rates. This is assumed because most workers do not report any cases less severe than heat exhaustion and typically treat themselves in the event of any degree of heat-related illness.