Dehydration is a dangerous condition and every effort should be made to avoid it. Dehydration will cause an increase in heart rate to do the same job, possible kidney damage over the long term and a lowered resistance to heat.
This is a facts poster helping staff understand the common heat stress indicators and their appropriate response.
The chart indicates how the combination of humidity and temperature can result in an increased heat index. The heat index is an index that combines air temperature and relative humidity in an attempt to determine the human-perceived equivalent temperature.