Below is a table indicating possible complications at varying levels of heat index values, obtained from Wikipedia.Note that exposure to full sunshine can increase heat index values by up to 14°F.
Enter a temperature that you would like and choose your units: What the temperature feels like to your body: Fahrenheit Celsius ° F: Enter your relative humidity: % ° C . So 85 degrees at 10% humidity, the temperature feels closer to 79 degrees, but at 90% humidity, it will feel closer to 100 degrees outside. Heat index values are particularly important for children. You can find the heat index in your city without actually doing any math thanks to online heat index calculators like those from the National Weather Service and the The Washington Post. This perception of heat is what the heat index seeks to measure, and while it can technically be used indoors, it is most often used in reference to outside temperature.Like the Wind Chill Temperature Index, the heat index used by the National Weather Service (NWS) in the United States is based on many assumptions such as body mass, height, clothing, individual physical activity, blood thickness, and wind speed. We then estimate what temperature it feels like, using a mathematical model of an adult walking outdoors in the shade. This difference in perceived and actual temperature is the result of a mixture of air temperature, relative humidity, and wind speed.The perception of heat is subjective, and can be affected by various factors such as menopause, pregnancy, and the effects of drugs or withdrawal, as well as differences in hydration, body shape, and metabolism. In addition to children, people with certain conditions including obesity, diabetes, heart disease, cystic fibrosis, and mental retardation are at greater risk of overheating and dehydration. The human body cools itself through perspiration, where heat is removed from the body as a result of the evaporation of sweat. Sweat is the human body's physiological response to high temperatures, and is an attempt to lower body temperature through evaporation of sweat. As such, depending on how significantly these assumptions vary from the reality of an individual, heat index estimates may not accurately reflect perceived temperature. Please select one of the following: The Steadman Apparent Temperature is defined as the temperature that (at a reference level of humidity and without wind) would produce the same level of discomfort in such an adult as the current combination of ambient temperature, humidity and wind chill. Isaias is expected to track from just offshore of northeastern Florida toward coastal South and North Carolina on Monday. Tropical Storm Isaias will deliver heavy rainfall, flash and urban flooding, high winds, dangerous storm surge, coastal flooding, life-threatening surf, rip currents, and severe thunderstorms with tornadoes to portions of the Eastern U.S. through early this week. This temperature can have potentially severe medical effects. At 85 degrees Fahrenheit with 10% humidity, the temperature feels closer to 79 degrees, but at 90% humidity, it will feel closer to 100 degrees. Please try another search.Multiple locations were found. This calculator estimates the temperature felt by the body as a result of air temperature and relative humidity.Heat index is often referred to as humiture, and is similar to wind chill in its attempt to measure perceived, rather than actual temperature. In either calculator, enter the temperature in degrees (F) and the other factors (numerical entry only); then click on Calculate. Young children are generally in more danger due to factors including larger skin surface relative to their small bodies, higher heat production as a result of exercise, and typically sweating less than adults.
This script calculates the Heat Index ( or "feels like" temperature) from the relative humidity or from the dew point, along with the ambient air temperature in degrees Fahrenheit (F). The lower rate of evaporation subsequently lowers the rate at which the body cools, increasing the perception of heat. For example, an air temperature of 83°F with a relative humidity of 70% would result in an estimated 88°F perceived temperature. These values are found using a complex formula, but thanks to the National Weather Service, you can find the “feels like temperature” using this simple calculator- Heat Index Calculator . A higher relative humidity affects normal body cooling by reducing the rate of evaporation of sweat. Below is a chart based on the NWS equation that can be used to estimate temperature and the level of danger associated with varying relative humidity percentages.As described above, the heat index is the temperature equivalent perceived by humans as a result of air temperature, relative humidity, and wind speed.