INDIANAPOLIS, INDIANA — A dangerous and life-threatening heat event is building across all of Indiana beginning Monday, with heat index values expected to surge into the upper 90s to mid 100s statewide before the worst arrives Tuesday and Wednesday.
Tuesday June 30 heat index forecasts show values ranging from 102 degrees in Muncie to a staggering 110 degrees in New Albany, with southern Indiana bearing the brunt of the most extreme apparent temperatures. Evansville and Vincennes will both reach 109 degrees, while Terre Haute and Versailles hit 108 degrees. Heat index values approaching 110 degrees represent a life-threatening situation for anyone without access to adequate cooling.
Southern Indiana Faces the Most Extreme Heat Index Values
The most dangerous heat index readings Tuesday are concentrated across southern Indiana, where New Albany reaches 110 degrees, Evansville and Vincennes hit 109 degrees, and Terre Haute and Versailles approach 108 degrees. These extreme values result from the combination of very high temperatures and oppressive dewpoints trapped under the powerful heat dome parked over the region.
Central Indiana Also Under Dangerous Heat Index Readings
Central Indiana communities are not spared from the dangerous heat, with Indianapolis and Lafayette both forecast to reach 106 degrees on the heat index Tuesday. Fort Wayne in northeastern Indiana will see 107 degrees, while Bloomington reaches 104 degrees and Muncie hits 102 degrees, keeping the entire state well above dangerous thresholds.
Northern Indiana Communities Face 103 to 104 Degree Heat Index
Even northern Indiana communities typically buffered by Lake Michigan proximity will see dangerous heat index readings Tuesday, with Gary and Rensselaer at 103 degrees and South Bend reaching 104 degrees. The heat dome is broad enough to eliminate any meaningful relief across the entire state through Tuesday and Wednesday.
Critical Heat Safety Steps Required Throughout the Event
Forecasters are urging all Indiana residents to hydrate continuously, limit outdoor time during peak afternoon hours, wear loose and light-colored clothing, bring pets indoors, and actively check on vulnerable neighbors, elderly family members, and anyone without reliable air conditioning throughout this dangerous multi-day heat event.
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