Livestock Heat Abatement: Protecting Farm Animals from Climate-Driven Heat Stress

Rising temperatures due to climate change are increasing heat stress risk for livestock globally. Heat abatement strategies protect animal welfare, productivity, and health.

Key Facts

Heat stress occurs when animals cannot dissipate body heat fast enough to maintain core body temperature within a safe range
Dairy cows begin experiencing heat stress at temperatures above 25 degrees Celsius when humidity is taken into account (temperature-humidity index above 68)
Heat-stressed dairy cows reduce feed intake by up to 20%, decrease milk production, and show elevated cortisol and reproductive failure
Broiler chickens in hot conditions reduce activity, increase water intake, and in severe cases suffer respiratory failure — heat waves kill millions of birds annually
Pigs are particularly vulnerable to heat stress as they cannot sweat and rely on behavioural thermoregulation
Shade provision, forced ventilation, evaporative cooling, and cool drinking water are the primary welfare interventions for heat abatement
Climate projections suggest heat stress risk will increase substantially across major livestock production regions by 2050 under current warming trajectories

Welfare Considerations

Heat stress is one of the most significant and growing animal welfare threats in agriculture. Unlike cold stress, which is often visible in animal behaviour, heat stress can progress from discomfort to organ failure and death with relatively little warning, particularly in intensive indoor systems where animals cannot access shade or cool ground. The welfare and productivity consequences of heat stress are aligned: hot cows produce less milk, hot pigs grow more slowly, and heat-stressed poultry have higher mortality — creating economic incentive for producers to invest in cooling. However, economic incentives are insufficient on their own: welfare standards should mandate minimum heat abatement requirements for all species in all production systems, not just where productivity losses make it commercially worthwhile.

What You Can Do

Advocate for mandatory heat action plans in farm assurance standards for all major livestock species
Support legislation requiring shade, ventilation, and cooling access for farm animals during heat events above species-specific thresholds
Choose welfare-assured products from farms that demonstrate heat abatement investments in their assurance documentation
Engage with climate and farming policy on the need to future-proof livestock systems against increasing heat stress risk
Support research into heat-tolerant livestock genetics that reduce the physiological burden of heat stress in warmer climates
Donate to welfare organisations monitoring heat-related mortality events and advocating for emergency welfare standards during heat waves
Raise the connection between climate action and farm animal welfare — reducing warming protects billions of animals from heat stress