Summer in New England often brings ideal conditions for utility and infrastructure projects. Long daylight hours and favorable weather allow contractors to maximize productivity and keep projects moving. However, rising temperatures also introduce one of the most underestimated hazards on a jobsite: heat stress.

Recognizing these risks, OSHA recently updated its National Emphasis Program (NEP) for Outdoor and Indoor Heat-Related Hazards. The revised program reinforces OSHA’s commitment to heat illness prevention and signals continued enforcement activity across high-risk industries, including utility construction, excavation, roadway work, and infrastructure projects.

For decades, many contractors associated severe heat stress with southern states. Today, New England is experiencing more frequent periods of elevated temperatures, extended heat waves, and higher humidity levels during peak construction season. Massachusetts public health officials continue to track heat-related illnesses because heat exposure has become an increasingly important occupational health concern.

For utility contractors, this means heat exposure is no longer limited to a handful of exceptionally hot days. Extended periods of elevated temperatures are becoming more common, increasing cumulative worker exposure throughout the summer construction season.

Heat illness occurs when the body’s cooling mechanisms can no longer keep pace with environmental conditions and physical exertion. Workers can quickly progress from mild symptoms to life-threatening emergencies if warning signs are overlooked.

Heat-related illnesses include:

• • • Heat Rash
    • Heat Cramps
    • Heat Exhaustion
    • Heat Stroke

Heat stroke is a medical emergency and may involve confusion, loss of consciousness, seizures, and body temperatures exceeding 104°F.

UNIQUE CHALLENGES FOR UTILITY CONTRACTORS

Utility contractors face several risk factors not commonly found in other industries.

Excavations and trenches often trap heat and limit natural airflow. Roadway work exposes workers to reflected heat from asphalt and concrete surfaces. Utility vaults, pump stations, manholes, and underground structures can become heat traps with limited ventilation and elevated humidity levels.

Heavy personal protective equipment—including hard hats, gloves, high-visibility apparel, respiratory protection, and fall protection equipment—further reduces the body’s ability to dissipate heat.

Emergency utility repairs add another layer of complexity. Water main breaks, sewer failures, gas emergencies, and electrical outages occur regardless of weather conditions. Crews are frequently required to work extended hours during the hottest periods of the day.

Construction remains one of OSHA’s primary focus industries under the revised Heat NEP. OSHA inspectors may initiate inspections when heat advisories are issued, complaints are received, heat-related injuries occur, or hazards are observed during unrelated inspections.

Contractors should expect increased emphasis on documented heat illness prevention programs, employee training, acclimatization procedures, and evidence that preventive measures are consistently implemented.

CASE STUDY: EMERGENCY REPAIR OPERATIONS

Consider a crew responding to a water main break during a regional heat advisory. Workers arrive after already completing part of a normal shift. They enter an excavation, operate pumps, move materials, and perform repairs under significant physical exertion.

Air temperatures reach the low 90s while pavement temperatures exceed 120°F. Although drinking water is available, fatigue accumulates throughout the day. A crew member begins experiencing symptoms of heat exhaustion that initially appear to be simple fatigue.

This scenario illustrates why supervisors must recognize heat illness warning signs early and why emergency planning should include heat-related medical emergencies alongside excavation, traffic, and confined-space hazards.

OSHA continues to emphasize three foundational controls:

Water: Readily available cool drinking water throughout the shift.

Rest: Recovery periods adjusted to environmental conditions and workload.

Shade or Cooling Areas: Tents, trailers, vehicles, or other locations where workers can reduce body temperature.

PLANNING AHEAD

Effective heat illness prevention begins before workers arrive onsite. Pre-job planning should include weather monitoring, heat index reviews, identification of high-exertion tasks, scheduling adjustments, hydration logistics, and emergency response planning.

Just as contractors routinely plan for excavation hazards, traffic control, and confined space entry, heat hazards should be addressed during project planning discussions.

Supervisors serve as the first line of defense against heat illness. Training should emphasize recognition of excessive sweating, dizziness, headaches, muscle cramps, confusion, unusual behavior, and fatigue.

Workers should also be encouraged to monitor one another. In many cases, coworkers notice symptoms before the affected individual recognizes a problem.

SIDEBAR: HEAT STRESS AND CONFINED SPACES – A DANGEROUS COMBINATION

For utility contractors, heat hazards become significantly more complex when confined spaces are involved.

Vaults, manholes, tanks, and underground utility structures often have limited airflow, elevated temperatures, increased humidity, and restricted access. Combined with physically demanding work, body temperatures can rise rapidly.

A worker suffering heat exhaustion inside a confined space may also require technical rescue capabilities, creating additional hazards for rescuers.

Heat monitoring, ventilation planning, hydration schedules, work/rest cycles, and rescue planning should be integrated into every confined space operation.

INDICATORS OSHA MAY LOOK FOR

1. 1. Written heat illness prevention program
   2. Acclimatization procedures
   3. Access to water, rest, and shade
   4. Supervisor training
   5. Heat hazard assessments
   6. Emergency response procedures
   7. Weather and heat index monitoring

CONCLUSION

The revised OSHA Heat National Emphasis Program should serve as a reminder that heat illness prevention is no longer a seasonal initiative—it is a core element of construction safety management.

As New England experiences more frequent periods of elevated temperatures and OSHA continues targeted enforcement efforts, utility contractors that proactively address heat hazards will be better positioned to protect workers, maintain productivity, and avoid preventable incidents.

Strengthen Your Jobsite Safety Plan with IS&R

Heat stress is only one of the hazards utility contractors must prepare for. Industrial Safety & Rescue provides professional standby rescue services, industrial safety training, confined space support, and customized rescue planning for high-risk work environments.

Whether your crews are working in trenches, utility vaults, manholes, confined spaces, or emergency repair operations, our experienced safety professionals can help you identify hazards, prepare your team, and strengthen your emergency response plan.

Contact Industrial Safety & Rescue today to learn how we can help protect your workers and support safer utility construction projects throughout New England.