Heat Index Values Near 105 Degrees Expected Across Arkansas, Louisiana, and Mississippi
June 11, 2026
Residents across portions of southeastern Arkansas, northeastern Louisiana, and much of Mississippi should prepare for dangerous heat conditions as heat index values climb to around 105 degrees over the coming days.
The combination of hot temperatures and elevated humidity levels will create oppressive conditions across central, north-central, northwest, south-central, southeast, southwest, and west-central Mississippi. While actual air temperatures may remain in the 90s, the added humidity will make it feel significantly hotter outdoors.
Why the Heat Index Matters
The heat index measures how hot it feels when humidity is combined with the actual air temperature. High humidity reduces the body’s ability to cool itself through sweating, increasing the risk of heat-related illnesses.
When heat index values approach or exceed 105 degrees, prolonged outdoor activity can quickly become dangerous, especially for vulnerable populations including:
- Older adults
- Young children
- Individuals with chronic medical conditions
- Outdoor workers
- Athletes and those participating in strenuous activities
Heat-Related Illnesses Can Develop Quickly
Exposure to extreme heat and humidity can lead to several health concerns, including:
Heat Exhaustion
Symptoms may include:
- Heavy sweating
- Weakness or fatigue
- Dizziness
- Nausea
- Headache
- Cool, pale, clammy skin
Heat Stroke
Heat stroke is a medical emergency and may include:
- Body temperature above 103°F
- Hot, red skin
- Rapid pulse
- Confusion or altered mental state
- Loss of consciousness
If heat stroke is suspected, call emergency services immediately.
Safety Tips During Extreme Heat
To reduce the risk of heat-related illness:
- Drink plenty of water throughout the day.
- Avoid strenuous outdoor activities during the hottest part of the afternoon.
- Take frequent breaks in air-conditioned or shaded areas.
- Wear lightweight, loose-fitting clothing.
- Never leave children or pets unattended in vehicles.
- Check on elderly relatives, neighbors, and those without adequate cooling.
Forecast Outlook
The heat and humidity pattern is expected to remain in place across portions of the Lower Mississippi Valley, creating dangerous afternoon conditions. Residents are encouraged to monitor local forecasts and any heat advisories or warnings that may be issued.
Radar Watch HQ will continue monitoring heat conditions and provide updates as temperatures and humidity levels evolve across the region.
Stay weather-aware, stay hydrated, and limit outdoor exposure during peak afternoon hours.
