![]() “These things absorb heat throughout the day and hold onto them at night. “If it doesn’t cool down enough overnight, there is not enough time for heat relief, especially in big cities where there are a ton of buildings, asphalt, concrete,” Brink said. Overnight heat and the heat index were key factors in Chicago’s 1995 heat wave, when more than 700 residents died. Minding that advice is especially important when nighttime and early morning lows approach high temperature records, she said. “We can beat it by getting inside near an air conditioner, staying hydrated by drinking lots of water and wearing moisture-wicking clothes,” Brink said. Of course, there are ways to combat the heat. In “direct sunlight, the heat index value can be increased by up to 15 degrees Fahrenheit,” according to the National Weather Service.Īnd the climate crisis is expected to increase exposure to dangerous heat index levels by 50% to 100% in much of the tropics and by up to 10 times across much of the globe, according to a 2022 study published in the journal Nature. “When we, as meteorologists, forecast the high temperatures or the heat index, that is in the shade,” Brink said. And a forecast high temperature of 97 degrees, with relative humidity of 71%, will make it feel like 105. For example, right now there’s only a one-degree difference between the feels-like temperature upstairs and the actual temperature (69.8 vs. So, a place with a predicted temperature of 100 degrees Fahrenheit and relative humidity of 73% can expect it to feel like 111 degrees, she said. How heat waves can kill - and how to stay safe (Photo by Drew Angerer/Getty Images) Drew Angerer/Getty Images The large heat wave will affect close to two thirds of the United States, with the East Coast and Midwest seeing the worst conditions. Lowest 22.3 ☌ at 10:10 pm Highest 25.5 ☌ at 1:38 pm 0.2 mm rain since 9 am 19 km/h 10 knots Highest Wind Gust Saturdays Observations. Sweltering heat is moving into the New York City area, with temperatures expected to rise close to 100 degrees by this weekend. 75: Humidity 25 ☌: Feels like 1014.9 hPa: Pressure CALM: Wind Direction 0 km/h 0 knots: Wind Speed 0 km/h 0 knots: Wind Gust The day so far. NEW YORK, NY - JULY 17: A woman cools off in the fountain at Washington Square Park during a hot afternoon day on Jin New York City.
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