Livestock Welfare During Heat Stress Events

Climate change is intensifying heat stress events that cause significant suffering, productivity loss, and mortality in farmed animals, requiring urgent adaptation in housing and management practices.

Key Facts

Heat stress costs the US livestock industry over 2.4 billion dollars annually in productivity losses
Dairy cows experiencing heat stress produce significantly less milk and show elevated stress hormones
Poultry are particularly vulnerable due to their limited thermoregulation capacity
Pigs lack sweat glands and depend entirely on behavioral cooling strategies and shade provision
Heat-related mortality events have killed millions of livestock in single extreme weather events

Welfare Considerations

Heat stress causes a cascade of welfare harms: animals experience discomfort, panting, reduced feed intake, altered thermoregulatory behavior, and in extreme cases, death. As climate change increases the frequency and intensity of heat events, welfare impacts on farmed animals will worsen without proactive adaptation. Shade provision, cooling systems, adjusted feeding times, and access to clean water are proven interventions that reduce both suffering and economic losses. Building heat resilience into farm infrastructure is both a welfare imperative and an economic investment.

What You Can Do

Support farms investing in heat mitigation infrastructure like shade, misters, and ventilation
Advocate for mandatory heat stress welfare standards in farmed animal regulations
Reduce consumption of animal products from systems with poor heat stress management
Donate to organizations developing climate adaptation resources for small-scale farmers
Learn about heat stress indicators in different species to recognize and report welfare failures