Construction leaders would never downplay or dismiss a fall, struck-by incident or equipment failure as “just part of the job.” Yet, some temperature-related conditions, such as heat exhaustion, frostbite and hypothermia, are often accepted as unavoidable consequences of working conditions. Temperature-related incidents likely won’t command the same attention as a crane collapse, but understating their seriousness can be a costly mistake. As extreme weather becomes more frequent and unpredictable, that mindset is becoming increasingly difficult to defend.
Extreme weather is not simply a seasonal inconvenience; it’s a serious occupational hazard. Heat waves, cold snaps and rapid temperature swings can contribute to serious injuries and fatalities—or SIFs—productivity losses and costly project disruptions. A single temperature-related incident can quickly become an OSHA recordable and project management challenge. Reduced physical and impaired cognitive performance from heat or cold stress can increase the risk of workplace incidents long before a medical emergency occurs.
The challenge with health conditions caused by temperature-related hazards is that they don’t typically announce themselves with a single dramatic event. Instead, risk often builds gradually. By the time symptoms become obvious, it could be too late. Recognizing the early signs of heat or cold stress is critical to preventing small problems from becoming serious incidents.
Heat Stress Remains a Persistent Construction Hazard
Construction consistently accounts for a disproportionate share of work-related heat-illness cases.[GS1] [LB2] A 2025 review found that construction workers account for 35% of all severe nonfatal workplace heat injuries, with injury risk rising 1% per 1°C increase and 17.4% during heatwaves. Heat-related illness often develops in stages, progressing from heat rash and muscle cramps to heat exhaustion and, eventually, heat stroke.
Early warning signs may include:
- Fatigue and weakness
- Muscle cramps
- Dizziness
- Headaches
- Confusion
If not addressed quickly, heat exhaustion can escalate to heat stroke, a life-threatening medical emergency characterized by loss of consciousness, altered mental status and dangerously elevated body temperature.
Several factors can increase vulnerability to heat stress, including obesity, cardiovascular disease, respiratory conditions, certain medications and a history of heat-related illnesses. [GJ3] [MR4] [LB5] Some industry-specific requirements, such as personal protective equipment, respirators and protective clothing, can increase heat burden by trapping body heat and restricting cooling.
Cold Stress Is Often Overlooked
While heat stress often receives greater attention, cold stress can be equally dangerous. Cold stress occurs when the body loses heat faster than it can replace it. According to U.S. Bureau of Labor Statistics data, construction workers experience 30 nonfatal slip, trip and fall injuries per 10,000 workers compared with the private industry average of 22.6. And the risk increases further during winter when icy, slippery conditions create additional hazards.
But temperature alone does not determine risk. Even when ambient temperatures are not particularly severe, wind, rain, wet clothing or prolonged exposure can dramatically accelerate heat loss, increasing the risk of cold injuries such as frostbite and hypothermia.
Early warning signs include:
- Persistent shivering
- Loss of sensation in fingers and toes
- Slurred speech
- Fatigue
- Confusion
Even before a medical condition develops, cold exposure can reduce dexterity, coordination, strength and cognitive performance. Individuals handling tools, operating equipment or performing safety-sensitive [GJ6] [MR7] job functions may be more susceptible to errors that contribute to incidents.
Some risk factors for cold stress extend beyond weather conditions. Workers with diabetes, peripheral vascular disease, asthma, chronic obstructive pulmonary disease or a history of frostbite and other cold injuries are more susceptible. Certain medications, nicotine and alcohol can also affect circulation and the body’s ability to regulate temperature.
Applying the Hierarchy of Controls
One of the most effective tools for managing weather-related risk is the hierarchy of controls. Rather than relying solely on worker behavior or PPE, this approach prioritizes reducing hazards at their source.
1. Elimination
Whenever possible, eliminate exposure. Examples include:
- Rescheduling work to avoid peak heat or cold
- Moving tasks indoors
- Delaying nonessential work during extreme weather events
- Increasing offsite prefabrication to reduce outdoor exposure
2. Substitution
Replace higher-risk conditions with safer alternatives. Examples include:
- Selecting lighter-weight PPE that maintains protection while reducing heat retention
- Using equipment or processes that limit worker exposure duration[GS8] (e.g., automated rebar tying tools, mechanical material lifts)
3. Engineering Controls
Modify the environment to reduce risk. Examples include:
- Shade structures and cooling stations
- Misting systems
- Climate-controlled break areas
- Heated shelters and enclosed workspaces
- Improved ventilation in enclosed environments
4. Administrative Controls
Change the way work is performed. Examples include:
- Work-rest cycles based on temperature conditions
- Mandatory hydration programs
- Temperature-based work modification protocols
- Crew rotation schedules
- Buddy systems
- Weather monitoring procedures
- Clear stop-work authority for supervisors
5. Personal Protective Equipment
PPE remains important but should be viewed as the last line of defense. Examples include:
- Cooling vests
- Moisture-wicking garments
- Insulated or heated outerwear[GJ9]
- Layered clothing systems
- Heated gloves
The strongest programs combine multiple levels of protection rather than relying on PPE alone.
Acclimatization Is Critical But Underutilized
Acclimatization is another effective tool for preventing weather-related illnesses, but it is often underutilized at worksites. Organizations should integrate acclimatization protocols into workforce planning and onboarding processes, as certain workforce dynamics can complicate this important transition. Employees who are entering the industry, returning from extended leave or relocating from different climates tend to be more vulnerable because their bodies have not adapted to the local environment.
Gradually increasing exposure to hot environments allows the body’s cooling systems to adapt. Similarly, employees entering cold environments benefit from progressively increasing exposure while receiving additional warming breaks and support.
Supervisors should pay particular attention to these employees during their first days or weeks on the job, adjusting workloads, breaks and exposure levels as needed.
Moving From Seasonal Programs to Risk-Based Safety
Many organizations approach weather safety as a seasonal initiative: hydration reminders in summer and cold-weather gear distributions in winter. As weather patterns become less predictable, calendar-based programs leave gaps in protection.
Instead of seasonal programs, organizations should adopt a risk-based approach that involves routinely monitoring conditions, evaluating worker vulnerability and implementing controls before conditions become hazardous. Weather preparedness should be incorporated into daily planning, supervisory oversight and project risk assessments.
Leadership’s Role in Extreme Weather Preparedness
Effective weather preparedness extends beyond equipment and procedures. It requires leadership commitment and a culture that encourages early reporting and intervention.
Leading contractors are weaving weather-related risk management into their workplace safety and health programs through:
- Medical surveillance and health screenings
- Supervisor training on heat and cold stress recognition
- Regular weather-monitoring protocols
- Temperature-specific emergency response procedures
- Frequent employee check-ins during extreme conditions
- Clear reporting pathways for symptoms and concerns
Proactive weather preparedness also supports compliance responsibilities. As regulatory guidelines evolve, employers are becoming more responsible for protecting workers from weather-associated occupational hazards.
Most importantly, leaders must empower workers to raise concerns without fear[GS10] . If workers perceive that production pressures outweigh safety considerations, warning signs may go unreported.
Extreme Weather Preparedness Is a Business Imperative
As the construction industry continues to reduce risks related to falls, equipment incidents, electrical hazards and struck-by exposures, it is essential to give extreme weather hazards the same level of attention. When a worker experiences heat exhaustion, hypothermia or frostbite, organizations should respond with the same discipline applied to any serious safety event:
- Investigate root causes
- Review controls
- Identify gaps
- Implement corrective actions
Weather-related injuries are not simply acts of nature. In many cases, they are preventable occupational exposures that can be managed through planning, training and systematic risk controls. Organizations that integrate weather resilience into safety planning, workforce management and project execution will be better positioned to protect employees, maintain productivity, control costs and fulfill project commitments.
So, when the next major weather event hits, will your organization be prepared or left reacting after the fact?
SEE ALSO: BUILDING RESILIENCY: WITHSTANDING WILDFIRES AND OTHER NATURAL DISASTERS
