Southwest Ohio Heat Alert: Dangerous 100–105°F Heat Index Grips Region Until 8 p.m. Wednesday

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Wilmington, Ohio – Hot, stagnant air is gripping southwest Ohio this week, with temperatures soaring into the 90s and heat index values topping 105°F across the region. A Heat Advisory and an Air Quality Alert remain in effect as health officials urge residents to take precautions.

According to the National Weather Service in Wilmington, the Heat Advisory will last until 8 p.m. Wednesday for much of central and southern Ohio, including Dayton, Cincinnati, and Chillicothe. Meanwhile, an Air Quality Advisory from the Southwest Ohio Air Quality Agency is active through midnight Monday for Butler, Clermont, and Hamilton counties due to elevated ozone levels.

Daytime highs will reach the low-to-mid 90s, while high humidity will push “feels-like” temps past 100°F. Cities like Springfield, Hillsboro, and Lebanon may also see poor overnight cooling, compounding heat risks for vulnerable groups. The heat dome is expected to linger into midweek before scattered storms bring limited relief Wednesday night.

Officials recommend limiting outdoor activity during peak afternoon hours, wearing light clothing, staying hydrated, and checking on elderly neighbors. Those with respiratory conditions are encouraged to carpool, limit driving, or avoid gas-powered lawn work to reduce emissions.

Heat alerts remain in effect until at least Wednesday evening. Additional thunderstorm activity is possible late week.


🌤️ Five-Day Forecast for Wilmington, OH

  • Tuesday: Sunny, high 93°F. Heat index near 102°F.
  • Wednesday: 40% chance of storms after 11 a.m. High 91°F.
  • Thursday: Partly cloudy, high 91°F. 50% chance of PM storms.
  • Friday: Scattered showers and storms. High near 91°F.
  • Saturday: Showers likely. High near 88°F. 60% rain chance.

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