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The humidity readings are now lower, and we are back in safe territory!!
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Where are we now??
Wet-bulb temperatures; I know this measure is used to protect outside workers in the US; it is used in other public institution such as homes for the elderly, daycare...
Short answer: Yes — wet‑bulb temperature (or WBGT, the wet‑bulb globe temperature) is increasingly used outside of worker‑safety contexts, including elderly‑care homes, hospitals, daycares, schools, sports programs, and emergency‑management agencies. It’s not yet universal, but adoption is growing fast because it’s a far better indicator of dangerous heat than the regular air temperature.
🌡️ What wet‑bulb temperature actually measures
Wet‑bulb temperature reflects how well the human body can cool itself through sweat.
It combines:
Air temperature
Humidity
Wind
Solar radiation (if using WBGT)
When humidity is high, sweat can’t evaporate, and the body overheats even at temperatures that look safe. That’s why wet‑bulb is used for heat‑stress thresholds.
🏥 Where wet‑bulb / WBGT is used beyond outdoor workers
1. Elderly‑care homes & long‑term care facilities
Many facilities in the US, Canada, and Europe now use WBGT or simplified heat‑stress indices to decide:
When to move residents to cooled common areas
When to increase hydration rounds
When to restrict outdoor time
Older adults have impaired thermoregulation, so humidity‑driven heat stress is a major risk.
2. Hospitals & medical emergency departments
WBGT is used in heat‑stroke triage protocols, especially during heat waves.
Some hospitals monitor WBGT to anticipate surges in heat‑related admissions.
3. Daycares & preschools
Increasingly used to set rules for:
Outdoor play
Water breaks
Shade requirements
Several US states (e.g., Texas, Arizona, Florida) have guidance for childcare centers based on WBGT or similar heat‑stress indices.
4. Schools (K–12)
WBGT is widely used for:
Recess restrictions
Canceling outdoor sports practices
Adjusting physical‑education classes
Athletic associations (NCAA, high‑school sports federations) already mandate WBGT thresholds.
5. Retirement communities & assisted‑living
Many facilities use WBGT to trigger:
Cooling‑center activation
Mandatory hydration
Outdoor activity bans
6. Public‑health agencies
The US CDC, NOAA, and NIOSH promote WBGT for heat‑stress warnings.
Canadian public‑health units increasingly reference WBGT during extreme‑heat advisories, especially in Quebec and Ontario.
7. Emergency‑management & municipal heat‑response plans
Cities like Phoenix, Miami, and Las Vegas use WBGT to activate heat‑emergency protocols.
Some municipalities use WBGT to decide when to open cooling shelters.
🇨🇦 In Canada (including Québec)
Canada doesn’t yet have a nationwide WBGT standard, but:
Environment and Climate Change Canada uses humidex for public alerts, but WBGT is used internally for occupational and emergency‑response planning.
Québec’s INSPQ has published guidance encouraging WBGT‑based thresholds for vulnerable populations.
Many CHSLDs and private seniors’ residences use WBGT or humidex‑adjusted thresholds during heat waves.
Given your location in St‑Jean‑sur‑Richelieu, local health authorities typically rely on humidex for public messaging, but facilities often use WBGT behind the scenes because it’s more protective.
🧩 Why WBGT is spreading beyond worker safety
Three reasons:
Heat waves are getting more humid, making humidex and air temperature alone misleading.
Vulnerable populations (elderly, infants, people with chronic illness) are at risk even at moderate temperatures.
WBGT predicts heat‑stroke risk far better than any other simple index.
If you want, I can also explain:
The exact WBGT thresholds used for elderly‑care or daycare settings
How to estimate WBGT from regular weather data
Whether your local weather station reports WBGT
How to interpret dangerous wet‑bulb values for home safety
Would you like a practical guide tailored to Québec’s climate?
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