| Heat Index
Chart Temperature (°F) vs. Relative Humidity |
|||||||||||||||
| 10% | 15% | 20% | 25% | 30% | 35% | 40% | 45% | 50% | 55% | 60% | 65% | 70% | 75% | 80% | |
| 115 | 111 | 115 | 120 | 127 | 135 | 143 | 151 | ||||||||
| 110 | 105 | 108 | 112 | 117 | 123 | 130 | 137 | 143 | 151 | ||||||
| 105 | 100 | 102 | 105 | 109 | 113 | 118 | 123 | 129 | 135 | 142 | 149 | ||||
| 100 | 95 | 97 | 99 | 101 | 104 | 107 | 110 | 115 | 120 | 126 | 132 | 136 | 144 | ||
| 95 | 90 | 91 | 93 | 94 | 96 | 98 | 101 | 104 | 107 | 110 | 114 | 119 | 124 | 130 | 136 |
| 90 | 85 | 86 | 87 | 88 | 90 | 91 | 93 | 95 | 96 | 98 | 100 | 102 | 106 | 109 | 113 |
| 85 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 93 | 95 | 97 |
| 80 | 75 | 76 | 77 | 77 | 78 | 79 | 79 | 80 | 81 | 81 | 82 | 83 | 85 | 86 | 86 |
| 75 | 70 | 71 | 72 | 72 | 73 | 73 | 74 | 74 | 75 | 75 | 76 | 76 | 77 | 77 | 78 |
| Heat Index/Heat Disorders | |||||||||||||||
| Heat Index | Possible heat disorders for people in higher risk groups | ||||||||||||||
| 130 or higher | Heatstroke/sunstroke highly likely with continued exposure. | ||||||||||||||
| 105-130 | Sunstroke, heat cramps or heat exhaustion likely, and heat stroke possible with prolonged exposure and/or physical activity. | ||||||||||||||
| 90-105 | Sunstroke, heat cramps and heat exhaustion possible with prolonged exposure and/or physical activity. | ||||||||||||||
| 80-90 | Fatigue possible with prolonged exposure and/or physical activity. | ||||||||||||||
| Source: National Weather Service | |||||||||||||||
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