| http://www.w3.org/ns/prov#value | - One expert source states that a THI above 150 represents a serious threat to horses??? health, especially if the humidity value is more than half of the combined sum.3 In the critical temperature range of 89-96 degrees Fahrenheit, a large horse is greatly challenged in its ability to dissipate body heat into a hot environment, especially if high humidity is a factor.
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