Beyond the Water Jug: Integrating Heat Safety into Construction Workflows

With construction workers facing 13 times higher risk of heat-related death, and a hotter-than-normal summer forecast for 2026, safety professionals must prioritize heat stress prevention. Learn to distinguish between heat stress and heat strain, identify early warning signs workers might hide, and implement practical strategies from hydration and acclimatization to shade structures and culture change that protect workers when temperatures rise.

• By Emory Tischler
• Aug 06, 2026

It’s a hot, humid day in July on a construction jobsite. Next thing you know, you’re experiencing dizziness, confusion, lightheadedness, difficulty concentrating and increased irritability. Those initial symptoms can quickly escalate to heavy sweating, nausea, headache and weakness. In as little as 10 to 15 minutes, a normal workday can turn into a crisis. Construction is not a climate-controlled environment, and when compounded by PPE, heavy machinery and concrete, jobsites can become dangerous “heat islands” during the summer months. In fact, construction workers are 13 times more likely to die from a heat-related illness than workers in other industries.

The Old Farmer's Almanac, along with the National Oceanic and Atmospheric Administration, is forecasting a hotter-than-normal summer across much of the United States in 2026. As the industry enters the peak of summer, it is important to address the high stakes of a silent killer like heat on a construction site.

What Should Construction Professionals Watch For?

First, it is important to understand the difference between heat stress and heat strain. Heat stress refers to the external environmental conditions to which workers are exposed, including temperature, humidity, direct sunlight and radiant heat from equipment or surfaces. Heat strain, on the other hand, is the body’s physical response to those conditions. This can include elevated heart rate, excessive sweating, dehydration, dizziness, fatigue and reduced cognitive function. Monitoring both environmental conditions and worker response is critical to preventing heat-related illnesses.

Construction professionals should pay close attention to surface and radiant heat exposure during warmer months, especially when working with materials like steel or operating blacktop and asphalt machinery. These surfaces absorb and retain heat throughout the day, significantly increasing surrounding temperatures and placing additional stress on the body. Even when air temperatures appear manageable, radiant heat from equipment, pavement and metal surfaces can rapidly elevate body temperature and contribute to dehydration and fatigue.

Heat-related conditions can also create secondary safety risks on active job sites. Sweaty hands can reduce grip strength and increase the likelihood of dropped tools, slips or mishandling equipment. Fogged or sweat-covered safety glasses may obstruct visibility and contribute to line-of-fire incidents, in which workers are struck by moving equipment, materials or tools. As heat intensifies, small impairments in visibility, coordination and focus can quickly become serious safety hazards.

Heat illness is a silent killer, and unless you know what to look for, you could make a grave mistake. For example, a worker who looks like he is taking a nap during his break time, but is actually roasting in the sun. Many people would walk by him, unaware that he was having a heat stroke, and assume he was resting. People do not take naps out in the sun. Seeing subtle signs like this can be the difference between life and death.

What Should Construction Teams Do About It?

Heat stress and heat hazards require multiple layers of precaution, many of which begin long before workers clock in. Many construction workers start their day already dehydrated by relying solely on coffee or energy drinks. During the summer months, hydration and electrolyte intake should be prioritized to ensure workers begin the day prepared not only for productivity, but also for health and safety.

From there, construction schedules may need to be reimagined by prioritizing high-exertion tasks during the earlier, cooler parts of the day. During periods of extreme midday heat, crews should take frequent five-minute breaks in shaded areas as needed. In many cases, by the time symptoms of heat exhaustion appear, intervention is already overdue.

On the structural side of jobsites, teams can install temporary shade structures, industrial misting fans and cooling trailers, especially on remote sites, to ensure workers have spaces where they can effectively recover during breaks. Teams can also implement a buddy system for heat safety, encouraging workers to monitor one another for early warning signs such as irritability or confusion, which are often among the first indicators of heat stroke.

For newer employees, acclimatization should remain a priority. Following the Rule of 20%, gradually increasing workload exposure by 20% each day, can help workers safely adjust to extreme conditions. However, this remains one of the most overlooked safety practices in construction due to demanding schedules.

More than anything, heat safety ultimately comes down to leadership and culture. The industry must move beyond the push-through-the-heat mentality and adopt a protect-the-pace mindset. While it may seem that continuous work improves productivity, more than 3.4 billion U.S. labor hours in construction and related sectors are lost each year due to heat exposure, underscoring the importance of maintaining a manageable pace. Workers should feel empowered to self-report symptoms or request breaks without fear of slowing down the project.

At Hardaway, we train our staff to over-communicate with everyone on the project during high-temperature days. Go out and talk to other workers on the jobsite. Talk openly about hydration and ask when they last had a drink of water. Ask when they last had a break. Continuous check-ins mitigate the risk of overworking in high temperatures, which can lead to heat illness. Make sure to listen when you are communicating with others. Listen for slurred speech or signs of fatigue in how they are communicating with you. If there is any question, encourage them to take a break. Our staff hands out water and stays on their toes as they walk the site. Often, even checking other Hardaway employees in the same manner. Awareness is everything.

Conclusion

Heat is the leading cause of weather-related deaths worldwide. Heat prevention is an active management responsibility, not a passive one. As the construction industry evolves, safety professionals must treat heat load with the same seriousness as structural load. Construction workers face a disproportionate risk of heat-related injuries despite representing only a small portion of the U.S. workforce. The small decisions made on jobsites each day throughout the summer can help change that reality and save lives.

This article originally appeared in the July/August 2026 issue of Occupational Health & Safety.