If a period of excessive heat extends more than a day or two without significant nighttime cooling, the problem becomes severe due to the heat retained in equipment, furniture, and walls. During the day this retained heat continues to be released into the immediate environment as radiant heat, which, when added to a rising outside temperature, can cause indoor temperatures to get uncomfortably hot. Air conditioning is a common solution, but this costs a lot and is not possible in many areas. Therefore, you should look at your work area and determine what you can do to reduce the heat load on your body. Temperatures just above 90 degrees can be dangerous, especially when the outdoor humidity is high.
Excessive heat can contribute to physical and mental changes.
These changes are early warning signs, alerting you to danger. If an employee feels sick or does not look well, suggest that they take a break or go home.