Equal warning across languages
Every language group should get the same check-ins and answer as quickly. A gap here means a message isn't landing.
How HeatGuard protects workers
- Workers choose to join. Nobody gets alerts until they reply YES to a plain message in their language. Replying STOP removes them at any time.
- Only what's needed. Phone number, crew, language and replies. No location tracking and no health history.
- Supervisors see crews, not medical detail. A worker's first name appears only while a live escalation is open, so someone can reach them. After it's handled, the record shows "worker".
- Never used against workers. HeatGuard data can't be used for discipline, pay, hiring, insurance or performance reviews.
- Replies are deleted after 30 days. Only counts remain for results reporting.
- Not a medical device. HeatGuard warns and guides. Anyone who feels unwell is routed to a person: the supervisor, the first-aider, or emergency services.
- When unsure, it raises the alarm. Missing weather data or no reply makes HeatGuard more cautious, never less.
How risk is worked out
- Heat index from air temperature and humidity, using the US National Weather Service formula.
- Up to 8°C more for working in direct sun, scaled by measured sunlight (OSHA guidance).
- Bands from OSHA heat-index guidance: Low, Caution, High, Extreme.
- One level higher for heavy work or non-breathable clothing, and one more for workers with under 7 days in the heat. Only applied once it's warm, so cool mornings don't raise false alarms.
- In the UAE, outdoor work is stopped 12:30–15:00 from 15 June to 15 September, as the law requires.