WBGT Heat Stress API
Wet Bulb Globe Temperature (WBGT) heat-stress index as an API, computed locally and deterministically. WBGT is the standard occupational and athletic heat-stress measure (ISO 7243). The wbgt endpoint computes the true index from measured thermometer readings: outdoors in the sun WBGT = 0.7·Tnwb + 0.2·Tg + 0.1·Tdb, and indoors or in the shade WBGT = 0.7·Tnwb + 0.3·Tg, from the natural wet-bulb, globe and dry-bulb temperatures, and returns the heat-stress flag and work-rest and hydration guidance. The estimate endpoint gives an approximate shade WBGT from just the air temperature and relative humidity using the Bureau of Meteorology approximation — e = (rh/100)·6.105·exp(17.27·T/(237.7+T)); WBGT ≈ 0.567·T + 0.393·e + 3.94 — for when you do not have a globe or wet-bulb thermometer. The flag endpoint classifies any WBGT value (°C or °F) into a heat-stress category — green, yellow, red or black — with the recommended work-rest cycle and water intake. Everything is computed locally and deterministically, so it is instant and private. Ideal for occupational-safety and industrial-hygiene tools, sports, military and outdoor-event planning, and environmental-monitoring apps. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is the WBGT heat-stress index; for the NWS heat index, wind chill and dew point use a weather-formulas API.
api.oanor.com/wbgt-api
