Livestock Heat Stress Climate Welfare

Rising temperatures from climate change are increasing heat stress in livestock globally and in the UK, causing significant welfare harm that is projected to worsen substantially in coming decades.

Key Facts

Cattle show heat stress at temperatures above 22C when combined with humidity
Pigs and poultry are highly susceptible to heat stress, with mortality events already occurring in hotter regions
Heat stress causes reduced feed intake, weight loss, reproductive failure, and immunosuppression
UK summer temperatures are projected to increase significantly by 2050 under current emission trajectories
Cooling measures including shade, ventilation, and water spray reduce but don't eliminate heat stress
High-yielding dairy cows generate more metabolic heat and are more susceptible than beef breeds
Climate models predict UK livestock producers will need to significantly modify housing by 2040-2050

Welfare Considerations

Heat stress causes genuine acute and chronic welfare harm. Animals unable to thermoregulate experience tachycardia, panting, reduced blood flow to vital organs, and eventual heat stroke. Chronic subacute heat stress causes accumulated welfare compromise through reduced productivity and immune function that owners may not immediately recognise as welfare harm. The climate trajectory means this welfare problem will intensify: summer periods where heat stress occurs will lengthen, and peak temperatures will increase. Adaptation requires infrastructure investment - improved ventilation, shade, and cooling systems - that has welfare benefits beginning now and preventing much worse outcomes in coming decades.

What You Can Do

Support research into heat-adapted livestock breeds and climate adaptation strategies
Advocate for farm building regulations requiring ventilation standards adequate for projected temperatures
Choose products from farms demonstrating climate adaptation investment including shade and cooling
Donate to farm animal welfare organisations working on climate adaptation guidance
Reduce overall farmed animal product consumption to reduce the scale of vulnerable populations