Most employers do not need to keep a specific workplace temperature under federal Occupational Safety and Health Administration (OSHA) regulations. At 82 degrees, workers would have a right to water, breaks and coolingoff areas.Employers will also have to monitor for signs of heat illness. An employer with workers exposed to high temperatures should establish a complete heat illness prevention program. Provide workers with water, rest and shade. When the temperature reaches 82 degrees Fahrenheit in indoor workplaces in California, employers must take steps to protect workers from heat illness. When the temperature reaches 82 degrees Fahrenheit in indoor workplaces in California, employers must take steps to protect workers from heat illness. California is finally set to approve a workplace safety rule to protect employees from excessive heat indoors. Why is it five years late? California has sharply cut its enforcement of heatprotection laws for outdoor laborers while extreme heat has intensified in recent years.