Heat Stress Adaptation in Dairy Production Systems

Heat stress poses a major challenge to dairy production worldwide, reducing milk yield, impairing reproduction and compromising animal welfare. Adaptation strategies span genetic, environmental and management approaches. Genetically, breeding for heat tolerance seeks animals that maintain productivity under thermal load. Environmentally, housing design and climate control—such as enhanced ventilation, shade structures and evaporative cooling—reduce the thermal burden on cows. Management tactics include altering feeding times, ration composition and water provision to support homeostasis during heat waves. Advances in precision livestock farming enable real-time monitoring of individual animals and microclimates, allowing swift interventions to avert productivity losses. Integrating these layers of adaptation is essential to secure dairy supply and animal well-being in a warming world.

Research from Nature Portfolio

Recent studies have demonstrated the value of genomic selection to enhance heat tolerance in dairy cattle. By using genome-wide DNA markers, researchers have identified animals whose genetic profiles predict resilience to thermal challenge. In controlled-climate trials, cows selected for superior heat-tolerance breeding values exhibited smaller declines in milk production and smaller rises in core body temperatures during simulated heatwave conditions than their less tolerant herd-mates. These findings confirm that genomic predictions can accelerate the development of dairy herds better adapted to elevated temperatures, offering a sustainable route to maintain productivity and welfare as global heat events become more frequent.

Heat Stress Adaptation in Dairy Production Systems publication trend

The graph below shows the total number of articles in heat stress adaptation in dairy production systems across all publications each year (not limited to Nature Index journals).

Technical terms

Temperature Humidity Index (THI): Composite measure of ambient temperature and humidity used to quantify heat stress in cattle.

Genomic selection: Breeding strategy that uses genome-wide DNA marker data to predict and select animals with desirable traits, such as heat tolerance.

Precision livestock farming (PLF): Integration of sensors, imaging and data analytics to monitor individual animals and inform management decisions in real time.

References

1. Impact of heat stress on health and performance of dairy animals: A review. Veterinary World (2016).
2. Genomic Selection Improves Heat Tolerance in Dairy Cattle. Scientific Reports (2016).
3. Global projections of heat stress at high temporal resolution using machine learning. Earth System Science Data (2025).
4. Environmental parameters to assessing of heat stress in dairy cattle—a review. International Journal of Biometeorology (2018).