Heat Stress Prevention

What is Heat Stress?

So what is heat stress? Heat stress happens when your body can’t cool itself fast enough. While most people connect it to hot summer days, it can happen almost anywhere. Outside in the sun, inside a garage, or even in winter if you’re overdressed.

When your internal body temperature rises too high, it starts interfering with the systems that keep you alive. Things like your heart, your breathing, and your circulation. If those systems are pushed too far, the outcome can be serious or even fatal.

Your Body’s Defense Mechanisms

The good news is your body has a built-in cooling system. As you heat up, blood moves toward your skin to release heat, and your sweat kicks in to cool you down through evaporation. But both of those systems rely on one thing, fluids! When you don’t replace what you’re losing, those systems begin to quickly fail.

That’s why hydration is EVERYTHING! Did you know you can lose up to a quart of fluid every hour when working in the heat? If you wait until you’re thirsty, you’re most likely already behind. Instead, drink consistently, about five to seven ounces every 15 to 20 minutes. Water is key, and electrolyte drinks help when you’re sweating heavily. Always avoid energy drinks, soda, and alcohol when in the heat, they’ll only make dehydration worse.

Sometimes hydration alone isn’t enough though, especially during the heat of the summer. Often times, your body also needs time to recover. Take regular rest breaks in shaded or cool areas, especially during peak heat. The hotter it gets, the more often those breaks need to happen.

Always know where your closest shaded or cooled area is. Shade isn’t optional—it’s a key part of preventing heat illness. If you’re working outside, make sure you have access to it at all times.

Warning Signs

As heat stress builds, your body will give you warning signs. It might start with heat rash which consists of itchy, irritated skin. Then come heat cramps, painful muscle spasms from lost electrolytes. You might feel dizzy or even faint as your body shifts blood to cool itself. If it continues, heat exhaustion can set in fast, bringing heavy sweating, weakness, confusion, and intense thirst. At that point, you need to get into a cool environment immediately and give your body time to recover. Don’t just watch yourself, watch each other. A coworker might notice symptoms before you do. If something seems off, speak up immediately.

Heat Stroke

The most dangerous stage of heat stress is heat stroke. This is a medical emergency. The body stops cooling itself, sweating may stop, and the skin becomes hot and dry. You may see confusion, nausea, or a rapid pulse. If you suspect heat stroke, call 911 immediately, move the person to a cooler area, and begin cooling them down, but do not give them anything to drink if they’re unconscious.

If you or a coworker starts showing symptoms, act fast. Get out of the heat, sit or lie down, and start cooling the body with water, wet towels, fans, or ice packs, especially around the neck and armpits. If alert and conscious, encourage fluids. Stay with them until they’re okay or help arrives.

Heat Stress Risks

It’s also important to recognize what increases your risk. High temperatures, high humidity, direct sunlight, and poor airflow all make it harder to cool down. On top of that, personal factors like not being acclimated to the heat, age, weight, certain health conditions, or medications can increase your risk. It usually takes about a 5-7 days for your body to adjust to working in the heat. Always take that into consideration as season change! Plus the risk of heat stress are the highest during the hottest parts of the day, typically mid-afternoon. Plan heavier work earlier or later whenever possible.

Heat Stress Prevention

Prevention comes down to simple habits. Stay hydrated, eat lighter meals to avoid raising your internal temperature, and pay attention to your body. Even something as simple as checking your urine can help. Clear urine often means you’re hydrated while dark yellow means you need more fluids. Always wear light breathable clothing, use sunscreen, and take advantage of fans or air conditioning whenever possible.

Remember, heat stress is preventable, but only if you stay aware and act early. Watch for the signs, take care of your body, and look out for your team. Because when it comes to heat, working harder isn’t the answer, working smarter is. If you feel symptoms coming on, report it immediately to your supervisor or dispatch. Don’t push through it, early reporting prevents serious incidents.