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The Independence Day holiday heatwave will boil to a head today with excessive temperatures baking the central U.S. Both the mercury and humidity will be shooting upwards like a firework, making the heat index surpass 100 degrees.
A broad area of high pressure will remain anchored from the Rockies to the Deep South, with the center directly over the Plains. Waves of hot air along with moisture from the Gulf of Mexico will shoot upwards into the Plains and Mississippi. The result will be a soupy, humid air mass over the nation’s midsection.
The heatwave will peak on the Fourth of July, with highs well into the 90s across Texas, Oklahoma, Louisiana and Arkansas. A few temperatures will also creep into the lower 100s for the extreme southern Plains. The combination of these temperatures and the humidity will make heat index values, or how warm the air feels, soar well past 100 degrees and in a few places, as high as 110 degrees over the next few days.
There will not be much relief from the sizzling heat tonight to watch fireworks as overnight lows will only drop into the upper 70s and 80s.
Temperatures and heat indices this high can lead to health problems, including heat stress or even heat stroke if you spend too much time outdoors without taking necessary breaks. If plans will take you outdoors through the holiday weekend, be sure to drink plenty of water and take breaks in the shade often. Sugary drinks and alcohol can dehydrate you, so try to keep these items to a minimum during your fun.