To reduce the chances of heat stress, it is better to:

The best approach to reduce the chances of heat stress is to frequently drink small to moderate amounts of cool water. This method helps to maintain hydration levels consistently throughout the day, allowing the body to regulate its temperature effectively. By sipping water regularly, you prevent dehydration, which can lead to heat-related illnesses such as heat exhaustion or heat stroke.

Drinking large amounts of water all at once can overwhelm the body and lead to a rapid flush of electrolytes, which could actually be counterproductive. Only drinking water when thirsty may not be sufficient, especially in hot conditions where the body loses fluids rapidly, and thirst is not always a reliable indicator of hydration needs. Additionally, consuming caffeinated beverages can increase the risk of dehydration, as caffeine has diuretic properties that might lead to increased urination. Therefore, maintaining a steady intake of cool water is the most effective strategy for preventing heat stress.