Heat stress assessment for outdoor workers
Heat stress is a serious occupational health hazard. When environmental temperatures exceed the body's capacity to dissipate heat, core body temperature rises, leading to heat exhaustion, heat stroke, and potentially death.
WBGT: Wet Bulb Globe Temperature
WBGT is the standard index for assessing heat stress risk. It combines:
- Wet bulb temperature (Tw) — humidity effect
- Dry bulb temperature (Ta) — air temperature
- Globe temperature (Tg) — radiation effect
WBGT guidelines define safe work-rest cycles based on activity level and WBGT value. Work should be stopped when WBGT exceeds safe thresholds (typically 25–28 °C depending on work intensity).
Weather monitoring for heat stress prevention
Continuous WBGT monitoring allows managers to:
- Implement preventive work stoppages before critical conditions
- Mandate rest periods and hydration during high heat stress
- Adjust work schedules to avoid peak heat hours
- Document heat stress exposure for legal compliance (Arbowet, NEN-EN ISO 7243)
How MeteoA helps
MeteoA's Trofic instrument measures all three WBGT inputs continuously at site level — without mains power or internet. Alerts are sent to supervisors when thresholds are approached, and all data is timestamped and archived for compliance documentation.
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See how MeteoA provides real-time WBGT monitoring and automated alerts for your construction site or outdoor workplace.
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