Heat Stress Management in Livestock

Heat stress affects livestock welfare and productivity significantly, and proactive management is increasingly critical as global temperatures rise.

Key Facts

Cattle experience heat stress when the temperature-humidity index exceeds 72
Heat stress reduces milk production, fertility, and immune function while increasing disease risk
Pigs have limited ability to sweat and are particularly vulnerable to high temperatures
Water, shade, and ventilation are the primary tools for heat stress mitigation in livestock

Welfare Considerations

Heat stress imposes both acute welfare harm — through physiological distress, reduced access to feed and water, and behavioral restriction — and chronic effects on health and reproductive performance. During heat stress events, cattle stop eating at peak temperature periods, reducing rumen health and milk quality. Pigs in hot conditions experience respiratory distress, increased mortality, and aggression. Poultry mortality in heat waves can be catastrophic without adequate ventilation. Proactive heat stress management using combination approaches including cooling water systems, shade structures, nighttime ventilation enhancement, and modified feeding schedules minimizes welfare impacts during heat events.

What You Can Do

Support mandatory heat stress mitigation standards for livestock in high-temperature regions
Choose products from farms with documented heat management plans
Advocate for climate adaptation planning that explicitly includes livestock welfare
Encourage research into heat-tolerant genetics that maintain welfare characteristics in warming climates