From Texas Standard: You may have heard that term ‘heat advisory’ quite a bit during this latest heat wave. It’s a notice the National Weather Service sends out to tell people that they need to take precautions to stay safe in the heat – especially people who work outside. In the Dallas Fort Worth Area, a heat index of 105 degrees triggers a heat advisory. And the reason it’s 105 degrees has to do with geography and, well, you. Alex Lyster is a senior forecaster with the National Weather Service in Midland. “Some places, you know, get hotter. So people are probably a little bit more acclimated to 105 degrees than other locations in the state, and that’s why their threshold is 110,” Lyster says. When it comes to declaring a heat advisory, there’s a sliding scale in Texas – not a finish line. In Midland, Lyster and his team have issued heat advisories each of the past four days, since either the temperature or the heat index hit 105 degrees. But there are other parts of the state where
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