Livestock Heat Stress Adaptation: Climate Change and Animal Welfare

Rising temperatures are making heat stress in livestock more frequent and severe — adaptation through management, genetics and infrastructure is an urgent welfare and food security priority.

Key Facts

Dairy cows begin experiencing heat stress at 22C with 50% humidity — a threshold increasingly exceeded in UK summers
Heat stress in dairy cows reduces milk production, reproductive performance and immune function simultaneously
Shade provision alone reduces heat stress by 30-40% in outdoor cattle systems
Genetic selection for heat tolerance is possible in cattle and poultry but conflicts with selection for production traits
The 2022 UK summer heat event caused cattle deaths at farms without adequate cooling infrastructure

Welfare Considerations

Climate change is transforming livestock welfare by making thermal stress events that were once exceptional into routine annual challenges across much of the world. UK summer temperatures that caused cattle deaths in 2022 will become normal summer conditions within decades. Welfare adaptation — shade, cooling, ventilation, thermal monitoring, and longer-term genetic selection for heat tolerance — requires investment decisions being made now for conditions 10-30 years in the future. Producers who invest in adaptation infrastructure protect their animals from acute welfare crises while future-proofing their operations for a warming climate.

What You Can Do

Support government funding for farm heat stress adaptation infrastructure as both a welfare and food security priority
Advocate for shade provision to be mandatory in livestock welfare standards for outdoor animals
Choose dairy products from farms with documented cooling and heat stress monitoring protocols
Engage with agricultural policy conversations about climate adaptation including the livestock welfare dimension
Donate to livestock welfare organisations developing guidance on heat stress management for a changing climate