There are few studies on the relationship between heat exposure and worker health impacts and productivity (22–25) in different industrial settings, and there is a dearth of data regarding the cardiac strain on female brickfield workers due to various factors. Thus, in India there are still very little data regarding thermal stress and its relationship with changes in heart rate, and the data that are available are neither very recent nor related to female workers of the unorganized labor sectors. Thus, the objective of this study is to evaluate the effect of workplace heat exposure and workload on the subjects’ health and productivity.