Transporting cattle in hot weather is one of the highest risk welfare events in the livestock supply chain. Heat stress during transport causes significant suffering and preventable mortality without proper precautions.
Heat stress during transport causes acute suffering that escalates rapidly if not managed. Animals cannot remove themselves from the heat source; they are confined, stressed by the transport process itself, and dependent entirely on vehicle ventilation and loading density decisions made before loading. Heat stroke causes hyperthermia, cardiovascular collapse, and brain damage before death. Animals that survive severe heat stress episodes may suffer lasting organ damage. The welfare imperative is prevention: checking weather forecasts before loading, scheduling transport for cooler parts of the day, ensuring adequate ventilation, and reducing stocking densities during hot periods. Monitoring trailer temperatures throughout journeys and having emergency water provision plans are practical welfare protections that all operators can implement.