How extreme weather including heat waves, floods, and blizzards affects livestock welfare, and evidence-based emergency planning and mitigation strategies for producers.
Extreme weather events represent acute welfare crises for livestock — concentrated, helpless populations of animals subject to environmental conditions that can cause mass suffering and death within hours. Unlike wildlife which can behaviorally thermoregulate through movement and habitat selection, confined livestock cannot escape deteriorating conditions without human intervention. The 2021 Pacific Northwest heat dome demonstrated the catastrophic potential of this vulnerability: millions of poultry died in commercial buildings where ventilation systems designed for normal Pacific Northwest temperatures were wholly inadequate for 40C+ conditions. Emergency preparedness for livestock welfare requires farm-level protocols specifying actions for different weather scenarios: specific temperature thresholds triggering ventilation maximization, misting system activation, stocking density reduction through emergency depopulation, and livestock evacuation planning. Climate change makes this planning increasingly non-optional — heat events that were once 100-year events are becoming decadal occurrences. Producer vulnerability is also a welfare consideration: the losses from weather-related livestock mortality cause significant economic and psychological harm to farming families.