Table 1.
Temperature-Humidity Index (THI) ranges and associated responses in livestock.
| THI Category | THI Ranges by Species | Respiration | Body Temperature Divergence (°C) | Behavioral Responses | Stress Level | |
|---|---|---|---|---|---|---|
| Cattle 1 | Sheep 2 & Goats 3 | |||||
| Normal | <74.0 | <82.0 | Normal | 0.00 | Normal | None |
| Alert | 74.0 to 79.0 | 82.0 to 84.0 | Steady but increased breathing |
+0.11 | Increased standing | Mild |
| Danger | 79.1 to 84.0 | 84.1 to 86.0 | Rapid, shallow breaths | +0.28 | Bunching, ↓ feed intake | Moderate |
| Emergency | >84.0 | >86.0 | Deep, abdominal breaths with tongue extended | +0.56 | Lingering at water source | Severe |