High-pressure atmospheric conditions combine with influences from La Niña, creating vast areas of sweltering heat that gets trapped under a "dome," according to NOAA. What is a heat dome?Įxtreme heat often results from a large area of high pressure, known as a "heat dome," AccuWeather said. Electricity usage increases as air conditioning and refrigeration units in homes and offices work harder to keep indoors cooler. High heat can deteriorate and buckle pavement, warp or buckle railway tracks and exceed certain types of aircraft operational limits. WHAT IS A DERECHO?: These 'inland hurricanes' can cause tremendous damageĮxtreme heat also impacts our infrastructure – from transportation to utilities to clean water and agriculture.
To be considered a heat wave, the temperatures have to be outside the historical averages for a given area.Ī couple of 95 degree summer days in Maine, for example, might be considered a heat wave, but a couple of 95 degree summer days in Death Valley would be pretty unremarkable, the weather service said. What is a heat wave? How does it impact us?Ī heat wave is a period of unusually hot weather that typically lasts two or more days, according to the National Oceanic and Atmospheric Administration. WHAT IS THE SAFFIR-SIMPSON HURRICANE WIND SPEED SCALE? Breaking down how we classify hurricanes. When the body gets too hot, it begins to perspire or sweat to cool itself off," the weather service said. "If the perspiration is not able to evaporate, the body cannot regulate its temperature." "This has important considerations for the human body's comfort. The heat index, also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature, according to the weather service. "It's not the heat, it's the humidity." That's a partly valid phrase you may have heard in the summer, but it's actually both, the weather service said. Here's all you need to know about excessive summertime heat and humidity. Scientists say more frequent and intense heat waves are likely because of human-caused climate change. Heat waves are less exciting or dramatic than other natural disasters such as tornadoes, hurricanes, flooding or even thunderstorms, but they kill more people in the U.S. than all other weather-related disasters combined – causing hundreds of deaths each year, according to the National Weather Service. But sometimes the heat can be extreme and dangerous for some people. Sure, it's summer, and it's supposed to be hot. Watch Video: Climate change: How US cities are already feeling the effects
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