Cattle Heat Stress Welfare During Climate Change

Rising global temperatures are intensifying heat stress in dairy and beef cattle, causing production losses, reproductive failure, and significant welfare harm requiring proactive management adaptation.

Key Facts

Cattle experience heat stress when the temperature-humidity index exceeds 72 — increasingly common in warming climates
Heat stress reduces dairy cow milk production by up to 25% and dramatically reduces conception rates
Affected cattle pant, reduce feed intake, increase water consumption, and seek shade aggressively
Sprinkler systems combined with forced air ventilation provide effective cooling in housed dairy systems
Black-coated cattle breeds are more susceptible to solar radiation heat load than lighter-coated breeds
Heat stress during late pregnancy causes calves to be born smaller with impaired immune function
Sub-Saharan African and South Asian cattle populations face the most severe projected climate-related heat stress increases

Welfare Considerations

Cattle experiencing heat stress suffer through hyperthermia, respiratory distress from continuous panting, reduced ability to forage due to metabolic heat production from feed digestion, and impaired reproductive function. Severe heat stress causing body temperature above 41 degrees Celsius is life-threatening. The welfare burden of heat stress is greatest in high-producing dairy cows with large metabolic heat loads and lowest in heat-adapted indigenous breeds in their native climates. Climate adaptation of cattle housing and management is an urgent welfare priority as temperatures rise.

What You Can Do

Support dairy welfare standards requiring cooling infrastructure rated for peak summer temperatures
Advocate for research into heat-tolerant cattle breeds and genetic selection for heat adaptation
Reduce beef and dairy consumption to lower greenhouse gas emissions driving the climate crisis
Learn about how heat stress affects cattle welfare and production across the global cattle population
Engage food companies on their supply chain climate adaptation plans for cattle welfare