The dangerous effects of unusually high temperatures on the human body fall into three basic types: Heat Cramps, Heat Exhaustion, and Heat Stroke. The heat may come from the sun or in industrial settings such as open-hearth furnaces in steel mills, multiple ovens in bakeries, boiler rooms, mines, and some factories, or it may result from house fires or wildfires which affect firefighters and residents alike. Construction and road crews, farmers, ranchers, and other outdoor workers are at risk from the sun's heat, as well as runners, bikers, hikers, and other outdoor sports enthusiasts.
