The Brief Highs in North Texas will reach 102°F on Tuesday and Wednesday, with heat index values pushing up to 105°F. Calm winds and high pressure have triggered an ongoing air quality alert through at least Tuesday due to stagnant atmospheric conditions. Mid-summer heat will continue to grip North Texas this week, with triple-digit temperatures and poor air quality dominating the forecast through Thursday before slightly cooler—yet more humid—conditions arrive by the weekend. Highs across the metroplex are expected to range between 98 and 102 degrees Tuesday afternoon, with heat index values reaching up to 105 degrees. However, an influx of humidity over the weekend means heat index values will continue to feel like the triple digits.