Acclimatization is a process by which the body adjusts to increased hot exposure. The body needs to adapt when working in hotter environments. According to Cal/OSHA guidance, employees are more likely to develop heat illness if they don't take it easy when a heat wave strikes or when starting a job that newly exposes them to heat. Most people are usually acclimated within four to 14 days of regular work involving at least two hours per day in the heat.​

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