INDIANA – Indiana is bracing for a significant heatwave as a new ‘heat dome’ settles over the Midwest, trapping hot and humid air across the region. This phenomenon is expected to drive heat index values, or “feels like” temperatures, well into the triple digits, posing a significant health risk to residents.
The oppressive conditions are expected to intensify in Indiana starting Wednesday, July 23, and persist through Thursday, July 24. While actual air temperatures in much of Indiana are forecast to be in the low 90s, it’s the exceptionally high humidity that will make it feel much hotter, with heat index values potentially climbing over 100 degrees for many Hoosiers. This is due in part to high dew points, which are being exacerbated by “corn sweat” from Indiana’s abundant crop growth and saturated soil from recent rainfall.
The National Oceanic and Atmospheric Administration (NOAA) has issued a Level 3 of 4 heat risk for much of the region, including Indiana, indicating that anyone without access to effective cooling or proper hydration could be impacted. This level of risk is rare and signifies a significant threat, not just to vulnerable populations.
Overnight temperatures will offer little relief, remaining close to 80 degrees in some areas, which is significantly warmer than typical July lows. The lack of overnight cooling increases the risk of heat-related illnesses, as the body does not have sufficient time to recover.
While scattered thunderstorms may provide some temporary relief by Friday and into the weekend, the overall pattern for August is expected to remain warmer than normal for much of the country, including Indiana. Residents are urged to take precautions, stay hydrated, and limit outdoor activities during the hottest parts of the day. For those without air conditioning, seeking out cooling centers or other air-conditioned spaces is highly recommended to avoid potentially deadly conditions.
