Farmed Animals

Livestock Welfare in Extreme Heat Events

Climate change is increasing the frequency and severity of extreme heat events that cause mass livestock mortality, representing one of the fastest-growing animal welfare emergencies globally.

Key Facts

Heat stress costs the US livestock industry an estimated 2.4 billion dollars annually in production losses
Dairy cattle show significant milk production declines and reproductive failure during heat stress
Poultry are particularly vulnerable — tens of millions of chickens die in heat waves annually
Thermal comfort zones for most livestock are exceeded regularly in parts of the world already
Shade access, evaporative cooling, and reduced stocking density are key heat mitigation measures

Welfare Considerations

Extreme heat causes acute suffering in livestock including panting, drooling, behavioral agitation, reduced movement, and ultimately death in severe cases. Heat stress is also chronic at temperatures below lethal threshold, impairing immune function, reproduction, and behavior. Climate change is making these conditions more frequent and severe. Adequate shade, water, and ventilation are basic welfare requirements that become life-saving interventions during extreme heat.

What You Can Do

Advocate for legal minimum requirements for shade and cooling in livestock facilities
Support climate action as a direct animal welfare intervention
Donate to organizations developing heat resilience resources for farmers in low-income regions
Share heat stress welfare information with farmers and agricultural extension services
Engage with food companies on heat stress welfare standards in their supply chains