Where exposure to extreme heat cannot be eliminated, risk must be minimised so far as reasonably practicable, for example by more air movement from fans, air-conditioning or evaporative coolers, insulating heat sources, local exhaust ventilation, mechanical aids for manual tasks and moving work to cooler times. Less effective measures to use as extras are slower pace, cool drinking water, cool rest areas with worker control of breaks, acclimatisation through job rotation and breaks, light clothing, and training. First aid is vital for heat illness, and medical attention should be sought for symptoms such as dizziness, fatigue, headache, nausea, breathlessness, clammy or hot skin, difficulty staying alert or absence of sweat.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.