I am sorry, but the documents provided do not contain information about heat stress. Therefore, I cannot provide specific guidance on this topic based on the given documents. However, heat stress is a serious workplace hazard, and it's important to take steps to prevent it. General recommendations include providing adequate ventilation 3, 4, 5, 20, ensuring workers have access to plenty of fluids, scheduling frequent breaks in cool areas, and providing training on recognizing and preventing heat stress symptoms.