A prolonged and dangerous heat wave is intensifying across Kentucky and southern Indiana this week, with triple-digit temperatures and heat index values soaring to 110°F in several communities.
The National Weather Service (NWS) in Louisville warns that these extreme conditions are expected to persist through at least Wednesday, with continued heat stress possible into late next week.
According to the latest forecast, cities like Louisville, Bowling Green, and Brandenburg are experiencing sustained periods of oppressive heat, with daily highs well over 100°F and little relief expected during the overnight hours.
The NWS HeatRisk map now shows large swaths of the region shaded in red and purple, indicating “Major” to “Extreme” risk levels for heat-related illness—especially in urban areas, low-elevation valleys, and places with limited shade or ventilation.
In Louisville, temperatures may peak at 106°F as early as Sunday, while Elizabethtown, Lexington, and Madison, Indiana, are forecast to see multiple consecutive days of 100°F or higher, a pattern that significantly increases the risk for heat exhaustion and heat stroke, especially for older adults, young children, and those with chronic medical conditions.
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Meteorologists emphasize that the heat index—which measures how hot it feels when humidity is factored in—will remain dangerously high, especially during the afternoon and early evening hours.
Monday and Tuesday are expected to be the most dangerous days, with heat index values in many areas topping 105°F to 110°F.
Public Health Precautions Urged
Officials are urging residents to take immediate precautions:
- Avoid outdoor activity during the hottest part of the day (typically 11 a.m. to 6 p.m.)
- Drink plenty of water and avoid alcohol and caffeine
- Check on vulnerable neighbors, particularly the elderly and those without air conditioning
- Wear lightweight, light-colored clothing, and use fans or air conditioners
- Employers are advised to adjust outdoor work schedules, provide frequent breaks in shaded areas, and monitor employees for signs of heat-related illness
Local agencies may open cooling centers or extend hours at public libraries, community centers, and malls to provide relief for those without access to air conditioning.
Looking Ahead
Forecasters say the heat wave is likely to continue through at least next Thursday, with only slight moderation expected toward the end of next week.
High humidity will remain a factor, limiting overnight cooling and increasing cumulative heat stress. If conditions worsen, the NWS may issue additional advisories or excessive heat warnings in the coming days.
This stretch of extreme heat comes amid a broader pattern of record-breaking summer temperatures across much of the central and eastern U.S., driven in part by persistent high-pressure systems and climate-related warming trends.
