![]() ![]() If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5☏ (37.5☌) to 100.9☏ (38.3☌), thermal conditions are potentially life-threatening. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Excessive warmth is eliminated from the body by evaporation of sweat. The human body normally cools itself by perspiration. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity. Young children are generally more endangered than adults, as they usually less sweat. Heat index values are especially crucial for babies and toddlers. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, wind, metabolic differences). Note: The heat index, also known as 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees. Note that heat index values are valued for light wind and location in the shade. Sustained activity may result in heatstroke. Take extra precautions, as heat cramps and heat exhaustion are possible. Heat indexIn August, the average heat index is appraised at a very hot 95☏ (35☌). In August, the average low-temperature is 66.9☏ (19.4☌). TemperatureIn Vienna, Virginia, the average high-temperature in August is relatively the same as in July - a moderately hot 85.8☏ (29.9☌). August, the last month of the summer in Vienna, is also a moderately hot month, with an average temperature ranging between min 66.9☏ (19.4☌) and max 85.8☏ (29.9☌). ![]()
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