What temperature outside can cause a heat stroke?
Aurelie Monahan
2025-08-02 14:35:29
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: 12
When the body gets too hot, it begins to perspire or sweat to cool itself off. If the perspiration is not able to evaporate, the body cannot regulate its temperature. Classification Heat Index Effect on the body Caution 80°F - 90°F Fatigue possible with prolonged exposure and/or physical activity Extreme Caution 90°F - 103°F Heat stroke, heat cramps, or heat exhaustion possible with prolonged exposure and/or physical activity Danger 103°F - 124°F Heat cramps or heat exhaustion likely, and heat stroke possible with prolonged exposure and/or physical activity Extreme Danger 125°F or higher Heat stroke highly likely. As shown in the table, heat indices meeting or exceeding 103°F can lead to dangerous heat disorders with prolonged exposure and/or physical activity in the heat. It surprises many people to learn that the heat index values in the chart above are for shady locations. If you are exposed to direct sunlight, the heat index value can be increased by up to 15°F. For example, if the air temperature is 100°F and the relative humidity is 55%, the heat index will be 124°F.
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