Most electronic devices can malfunction or stop working at temperatures below -20°C (-4°F) or above 60°C (140°F), depending on their design and specifications.
Extreme temperatures can make work unsafe or impossible. While no single temperature universally stops all work, guidelines exist to protect workers from heat stroke, hypothermia, and other temperature-related risks. This guide explains when temperatures become dangerous and how to stay safe.
When Is It Too Hot To Work?
Heat becomes dangerous when the body can’t cool itself effectively. The exact threshold depends on multiple factors:
- Humidity levels (high humidity prevents sweat evaporation)
- Direct sun exposure
- Work intensity (heavy labor generates more body heat)
- Protective equipment worn
- Worker acclimatization
According to Canadian Centre for Occupational Health and Safety, temperatures above 95°F (35°C) with humidity can lead to heat stroke. The Australian guidelines note that even lower temperatures can be hazardous during heatwaves.
Heat Stress Warning Signs
Watch for these symptoms in yourself and coworkers:
| Symptom | Severity |
|---|---|
| Heavy sweating | Early warning |
| Dizziness/nausea | Moderate |
| Confusion/disorientation | Medical emergency |
When Is It Too Cold To Work?
Cold stress becomes significant below 32°F (0°C), especially with wind chill. Risks include:
- Frostbite (can occur in minutes at extreme temps)
- Hypothermia
- Reduced dexterity (increasing accident risk)
For outdoor work in cold conditions, consider using indoor propane heaters in break areas or built-in gas heaters for semi-enclosed spaces.
Cold Protection Strategies
- Layer clothing (wicking base + insulation + windproof shell)
- Schedule frequent warm-up breaks
- Use heated tools when possible
- Monitor for pale skin or shivering
Industry-Specific Temperature Guidelines
Different workplaces have varying standards:
Construction
Follow WBGT (Wet Bulb Globe Temperature) index. At WBGT 86°F (30°C), reduce heavy work by 50%.
Manufacturing
OSHA recommends 68-76°F (20-24°C) for light work, with adjustments for heavier tasks.
Office Work
Thermal comfort range is typically 68-76°F (20-24°C) with humidity at 20-60%.
Legal Rights & Employer Responsibilities
While specific temperature regulations vary by region, employers must generally:
- Provide adequate ventilation and climate control
- Offer rest breaks in temperature-controlled areas
- Supply protective equipment (cooling vests, heated gear)
- Train workers on temperature-related risks
Workers have the right to refuse unsafe conditions in most jurisdictions when proper protections aren’t provided.
