Welfare of Farm Animals During Heat Waves — Acute Interventions

Extreme heat events are increasingly killing farm animals at scale, with interventions that can dramatically reduce suffering if implemented promptly.

Key Facts

Poultry are highly vulnerable to heat stress — chickens begin suffering above 27C and face death above 35C
A 2022 Kansas heat wave killed approximately 2,000 cattle over a few days
Pigs cannot sweat and rely entirely on respiration for cooling — they are extremely heat-vulnerable
Forced ventilation, misting systems, and reduced stocking density are the primary heat interventions
Water availability during heat events is critical — inadequate water access causes heat deaths within hours
Shade provision for outdoor and pasture animals dramatically reduces heat-related mortality
Emergency protocols for heat waves are underdeveloped or absent in many farm management plans

Welfare Considerations

Heat wave mortality in farm animals represents sudden mass suffering — thousands of animals dying in acute distress within hours. Prevention requires investment in cooling infrastructure, particularly for intensive poultry and pig housing. Emergency protocols — when to reduce stocking density, when to deploy emergency ventilation, when emergency slaughter is more humane than continued suffering — need to be developed before events occur rather than improvised during them. As heat waves become more frequent and intense with climate change, heat wave preparedness is an increasingly critical component of farm animal welfare.

What You Can Do

Support welfare standards that require minimum heat mitigation infrastructure on farms
Advocate for emergency welfare protocols to be mandatory in farm planning
Support research into heat-resilient breeds and management systems
Raise awareness of heat wave mortality in farm animals as a climate change welfare issue
Ask food companies about their supplier heat wave preparedness standards