Cattle Heat Stress: Climate Change and Livestock Welfare

Rising temperatures are making heat stress an increasingly serious welfare issue for dairy and beef cattle worldwide.

Key Facts

Heat stress costs the US dairy industry over 900 million dollars annually in lost production
Cattle begin experiencing heat stress at temperatures above 25 degrees Celsius with high humidity
Core body temperature above 40 degrees Celsius causes physiological damage in cattle
Respiratory rate increases dramatically in heat stressed cattle as they pant to cool
Black and dark-coloured cattle absorb more solar radiation and are more vulnerable

Welfare Considerations

Heat stress in cattle causes significant welfare harm through hyperthermia, respiratory distress, and metabolic disruption. Cows experiencing heat stress show reduced feed intake causing nutritional deficit during periods of peak lactation. Reproductive failure increases as heat affects egg quality and early embryo survival. Laminitis risk increases during recovery from heat stress. High-yielding dairy cows generate more metabolic heat making them especially vulnerable to high ambient temperatures.

What You Can Do

Ensure cattle have access to shade and cooling resources during hot weather
Support research into heat-tolerant cattle breeds and management systems
Advocate for housing standards that require adequate ventilation and cooling provision
Monitor cattle for signs of heat stress and implement emergency protocols in heat waves
Support climate policy that limits temperature rise to reduce future heat stress frequency