Heat Stress Load is used in cattle. The one we calculate is taking average wind into consideration.
Environmental conditions that can contribute to the heat stress load are:
- recent rainfall
- a high ongoing minimum and maximum ambient temperature
a high ongoing relative humidity
- an absence of cloud cover with a high solar radiation level
- minimal air movement over an extended period (4–5 days)
- a sudden change to adverse climatic conditions
Some cattle are more susceptible to excessive heat load (EHL) than other cattle based on:
- Breed: Bos indicus cattle are more heat tolerant than Bos Taurus. Genetic variations also exist within breeds.
- Coat colour and type: Cattle with lighter coat colours tend to be more tolerant of heat.
- Body condition: Heavier cattle tend to be more susceptible to EHL.
- Adaptation: Cattle will adapt to heat provided the temperature change is gradual.
- Health: Cattle with a prevailing health condition are less able to cope with temperature changes.
So this value is a good indicator to prompt you to keep an eye on your livestock, making sure they are ok.