Unlike the heat index, which tells you how the human body would feel under shade, the wet bulb temperature indicates the expected stress on the human body when it is in direct sunlight by measuring the effect of temperature, humidity, wind speed and solar radiation. The measurement is designed to effectively mimic how the body tries to cool itself with sweat. The name comes from the thermometer covered in a wet cloth that is used to take the temperature reading, according to the National Weather Service (NWS). ![]() The heat dome was expected to be centered over the mid-South by the weekend. The heat index, which indicates how hot it feels outdoors based on the temperature and relative humidity, was expected to reach 115 degrees (46 Celsius) in several cities. The National Weather Service issued an excessive heat warning for parts of Arkansas, Louisiana, Mississippi, and Tennessee for Thursday and Friday. Officials urged people to stay hydrated, shelter in air-conditioned rooms and check on each other as humidity combined with high temperatures to make conditions even more dangerous. ![]() A heat dome over Texas that shows no signs of abating has been tied to 13 deaths in the state, including another in Louisiana, according to The Associated Press.įorecasters said temperatures could rocket up to 20 degrees above average in parts of the region as a heat dome that has taxed the Texas power grid spread eastward. Thursday’s soaring temperatures marked yet another day under a deadly, oppressive heatwave across the South. ![]() 16 states, DC currently under poor air quality alerts – here’s when things will change
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