Download excessive heat warning7/12/2023 ![]() ![]() A heat advisory or excessive heat warning may eventually be needed. ![]() Hazardous Weather Outlook for Excessive Heat – A period of excessive heat is possible within the next 3 to 5 days. The National Weather Service in Mount Holly issues the following excessive heat products: Read the Excessive Heat workshop presentation here. ![]() Holding the temperature constant and increasing the relative humidity to 60 percent yields an apparent temperature of 110 degrees. For example, in the heat index chart below, a hot and very humid air mass with a temperature of 94 degrees and a relative humidity of 45 percent yields an apparent temperature of 100 degrees. Therefore, the body feels warmer when it’s humid, and this is why we use relative humidity. However, when the relative humidity is high, the increased moisture content in the air decreases the evaporation of perspiration or sweat. The body cools itself through the evaporation of perspiration or sweat. In short, it’s a measure of how close the air is to being saturated with moisture. Relative humidity is a measure of the amount of water in the air compared with the amount of water that air can hold at the current temperature. The Heat Index (image below), also known as the Apparent Temperature, is a subjective measure of what it feels like to the human body when relative humidity is factored into the actual air temperature. Heat-related illnesses increase as the combination of temperature and relative humidity increase, but there are other factors involved as well. Heat-related illness can occur when the ability of the body to cool itself is challenged, or when there are insufficient levels of fluid or salt in the body due to sweating or dehydration. A combination of high heat and humidity can lead to heat-related illness, including heat cramps, heat exhaustion, and heat stroke. This is especially true in the urban centers, where population density, the urban heat island, and building construction exacerbate the effects of excessive heat. Overview | Heat Index | Excessive Heat Products | Preparedness InformationĪ look at weather fatality statistics (image below) reveals excessive heat is the leading weather related killer in the United States. ![]()
0 Comments
Leave a Reply. |